East Anglia GREEN frequently asked questions

National Grid sits at the heart of Britain’s energy system, connecting millions of people and businesses to the energy they use every day. We bring energy to life – in the heat, light and power we bring to our customer’s homes and businesses; in the way that we support our communities and help them to grow; and in the way we show up in the world. It is our vision to be at the heart of a clean, fair and affordable energy future. 

Our individual companies run the systems and infrastructure that deliver power across the country. 

• National Grid Electricity Transmission (NGET) own, build, and manage the electricity grid in England and Wales to which many different energy sources are connected.

• National Grid ESO (Electricity System Operator) control the movement of electricity around the country ensuring supply meets demand.  

• National Grid Ventures (NGV) is the competitive division of National Grid, investing in energy projects, technologies, and partnerships to accelerate the development of our clean energy future. 

More information about National Grid can be found on ‘About Us’. 

National Grid Electricity Transmission (NGET), owns, builds and maintains the high-voltage electricity transmission network in England and Wales. In England and Wales, the high voltage network operates primarily at 400,000 volts (400 kV) and 275,000 volts (275 kV).  

It is NGET that is developing plans for the East Anglia GREEN reinforcement and are the electricity and transmission arm within National Grid.  

National Grid ESO is the Electricity System Operator for Great Britain. Generators of electricity apply to National Grid ESO when they wish to connect to the high-voltage electricity network. National Grid ESO leads the work to consider how the network may need to evolve to deliver a cleaner greener future. National Grid ESO is a separate legal entity from National Grid Electricity Transmission.

National Grid Ventures (NGV) sit outside the core regulated National Grid businesses, investing in technologies and partnerships that help accelerate the UK’s move to a clean energy future. This includes interconnectors, which are undersea cables that connect the UK with countries across the North Sea, allowing trade between energy markets and efficient use of renewable energy resources.

National Grid’s commitments when undertaking works in the UK can be found in our Stakeholder, community and amenity policy: Commitments when undertaking works in the UK.

When developing transmission network proposals, we have a statutory duty, under the Electricity Act 1989, to act in an efficient, coordinated and economical way, and have regard to the desirability of preserving amenity. 

When considering options to deliver additional electrical network capability, we must balance the need to develop the network in a way that is efficient, coordinated and economical, and minimises impacts on people and places.

In the UK, energy networks are regulated by Ofgem, (the Office of Gas and Electricity Markets). Ofgem operate under the direction and governance of the Gas and Electricity Markets Authority (GEMA). It has established price control mechanisms to ensure that the investment required to maintain a reliable and secure network is delivered at a fair price for consumers. 

Our shares are listed on the London Stock Exchange and as such, we are also regulated by the Financial Services Authority in the UK. 

The Department for Business, Energy & Industrial Strategy (BEIS), is a ministerial department responsible for business, industrial strategy, science, research and innovation, energy and clean growth, and climate change. BEIS are looking to build a stronger, greener future through innovation.  

Following the Government’s ‘Ten Point Plan for a Green Industrial Revolution’ in December 2020, BEIS published an energy white paper entitled ‘Powering Our Net Zero Future, which sets out how the UK will clean up its energy system and reach net zero emissions by 2050. BEIS works alongside Ofgem in setting the framework within which National Grid ESO, National Grid Electricity Transmission (NGET) and the wider energy sector operates. 

The Business Energy and Industrial Strategy (BEIS) department’s Offshore Transmission Network Review is currently looking at how the offshore electricity transmission network can be delivered in a more coordinated way to deliver net zero emissions by 2050, and we fully support that work. We will work closely with Government, stakeholders and coastal communities to ensure we play our part to deliver the infrastructure needed to achieve net zero in a way that reduces impacts on communities. 

In meeting that challenge there are two key considerations. The first is the way in which we best connect and coordinate the growth of offshore wind farms and interconnectors to the electricity transmission network along the immediate coastline. The second is the network reinforcements required further inland to accommodate the increased demand on the network and to ensure we can effectively transport the power to where it is needed across Great Britain. 

That offshore coordination work by Government is ongoing. As explained in the Energy White Paper, Government will be looking to redesign the current regime to bring more extensive coordination and mitigate environmental, social and economic costs for the 2030s and beyond. While developers will be encouraged, where early opportunities for coordination exist, to consider becoming pathfinder projects, National Grid ESO explains in the latest Network Options Assessment, that onshore reinforcement is still needed. The System Operator’s analysis found that the viable offshore options, in the scenario where 50 GW of offshore wind is achieved by 2030, do not displace any of the onshore reinforcement requirements that have been identified. 

Ofgem (the Office of Gas and Electricity Markets) is the government regulator for gas and electricity markets in Great Britain. Ofgem is a non-ministerial government department and an independent National Regulatory Authority, whose role is to protect consumers through delivering a greener, fairer, energy system. Ofgem works with Government, industry and consumer groups to help deliver a net zero economy at the lowest cost possible to consumers.

The Crown Estate is an independent commercial business, created by an Act of Parliament, with a diverse portfolio of UK buildings, shoreline, seabed, forestry, agriculture, and common land. The Crown Estate has worked alongside National Grid Electricity System Operator (ESO) and National Grid Electricity Transmission on studies regarding offshore wind development which will be significant in informing future policy choices on provision of offshore transmission infrastructure. 

Interconnectors are usually high voltage direct current cables that are used to connect the electricity systems of neighbouring countries. Interconnector runs under the sea, underground or via overhead cabling, to connect the electricity systems of two countries. They allow electricity to be traded between the market in Great Britain and the continent, ensuring energy resources are used efficiently by the sharing of surplus electricity, benefiting consumers in the UK and Europe by providing flexibility to import more affordable and renewable or low carbon sources of electricity, helping keep end-user bills as low as possible, helping reduce emissions and aiding security of supply. 

National Grid Ventures already operate interconnectors linking Britain with France, Belgium, the Netherlands and Norway – powering 6.4million homes with clean energy each year. By 2030 90% of the energy imported by our interconnectors will be from zero carbon energy sources.

Offshore wind power or offshore wind energy is the energy taken from the force of the winds out at sea, transformed into electricity and supplied into the electricity network onshore. 
 
The government’s Energy White Paper ‘Powering our Net Zero Future’ in December 2020 sets a target to deploy 50 GW of offshore wind by 2030 – enough to power every home. 
 
The Climate Change Committee anticipate that electricity demand will at least double by 2050 as we shift to clean energy to drive electric vehicles, heat our homes and power our industry. 
 
The Committee’s Sixth Carbon Budget ‘The UK’s path to Net Zero’ published in December 2020 recommends deploying 50 GW of offshore wind by 2030, rising to as much as 140 GW of offshore wind by 2050. 

National Grid Electricity Transmission doesn't build wind farms, but it is generally accepted that a good quality modern turbine has a design life of about 20 years. Good maintenance may extend that to 25 years or longer and offshore wind farms may be designed such that the turbine structure above the waves can be replaced at the end of its design life. 

Even when generation of electricity is located offshore, the demand for electricity remains onshore and is set to increase as we decarbonise our economy to achieve net zero. Therefore, there is a balance of what we can achieve offshore and onshore.

Offshore connections are often considered where the electricity being produced is a long way from where it is needed. A subsea connection in this case can often be economically facilitated through the use of subsea HVDC connections, where these connections occur over hundreds of kilometres. Due to the large cost of the HVDC converter stations required at each end of the link, these connections are only economic over long distances. Ultimately these HVDC bulk transfers of power will come onshore and then continue onto demand centres across the whole of England and Wales through onshore electricity infrastructure.

The use of subsea AC connections would be considered if more economic alternatives are not viable, or the subsea alternative is the most economical solution to move power to where it is required. Due to physical properties of AC cables at transmission voltages, these connections could not be too long in length. Due to the size, dimensions and number of cables required compared to HVDC they have a bigger impact to the marine environment. As the majority of demand is onshore and often inland across England and Wales, instances where subsea AC cables prove economic and effective to deliver electricity to the right places is rare and often less economic than other alternatives. 

In direct current (DC), the electrical charge (current) flows steadily in one direction. With alternating current (AC), the electrical charge keeps switching directions. Alternating current (AC) is normally used in generating, transmitting, and distributing electricity because it can be converted easily between voltages and loses less energy at lower voltages than DC. High voltage direct current (HVDC) offers some advantages over AC in particular circumstances. HVDC, for instance, is typically used to transmit power between two separate AC networks that are not synchronised - usually between two countries. HVDC also has advantages over very long transmission distances (hundreds of kilometres) within countries, or across the sea between different countries that are not electrically connected. 

The capital costs of HVDC installations can be much higher than for equivalent transmission routes. It is very difficult to give a direct comparison as the cost of any HVDC or AC connection depends on many project-specific factors, such as whether any of it is likely to be underground and route length. Under some circumstances, HVDC may be more economic than equivalent AC transmission; generally, the longer the route length the more competitive HVDC becomes. This is because the HVDC converter stations have a large capital cost, but the HVDC cables are lower cost than their AC counterparts. Therefore, as the distance increases the large cost of the converter stations is mitigated by the savings in the cost of the HVDC circuits. The break-even distance will vary depending upon the installation type but will be in the order of hundreds of kilometres. 

The East Anglia GREEN reinforcement is one of the essential network reinforcements needed to deliver on the UK’s net zero target – without it, cleaner, greener energy generated offshore would not be able to be transported to homes and businesses across the country. 

The network in East Anglia was built in the 1960s to cope with the level of demand at that time, and currently carries around 3,200 MW of electricity generation. The growth in new energy generation from offshore wind and nuclear power over the next decade is expected to increase generation in the region by 15,000 MW, whilst interconnection with other countries is expected to connect more than 4,500 MW of new interconnection into East Anglia. This means that there will be more electricity connected in East Anglia than the network can currently accommodate.  

Our existing power lines do not have sufficient capacity to accommodate this new generation. We are already carrying out work to upgrade the existing transmission network in East Anglia, however these upgrades alone will not be sufficient.   

East Anglia GREEN is a key part of our wider investment programme to upgrade our electricity transmission network in East Anglia to ensure we meet this future energy transmission demand. 

The System Operator, National Grid ESO, leads an annual process looking at how the electricity transmission network might need to adapt to likely changes to where the electricity we all use will come from. That starts with stakeholder discussions and analysis about potential Future Energy Scenarios which are published each summer. The System Operator takes those different scenarios and looks at what that might mean for the transmission network over the next ten years, publishing an Electricity Ten Year Statement each November. The transmission network owners, including National Grid Electricity Transmission, respond to the issues outlined in the Electricity Ten Year Statement with suggestions as to how those can be addressed. Then in January each year, National Grid ESO publishes a document known as the Network Options Assessment (NOA), which outlines their recommendations as to which reinforcement projects should be taken forward during the coming year to meet the future network requirements. 

A need was identified to resolve electrical boundary issues in East Anglia.  There are three onshore power boundaries where additional system flexibility is required to ensure that power generated in the area from offshore windfarms and nuclear generation has more ways to flow into the wider transmission network during maintenance or faults on the system.   

In addition, two new offshore windfarms off the Suffolk/Essex coast need to be connected to the transmission network to transport the low carbon energy they will produce to the homes and businesses where it will be used. 

The NOA 2021 identified need for an upgrade to the existing line in East Anglia in all future energy scenarios and this was confirmed in NOA 22. You can read more about the latest NOA report here. 

To understand current and future demands on the electricity network the concept of network boundaries is used. A boundary splits the system into two parts and shows where there are high-power flows between parts of the network. When flows across a network boundary are forecast to be above the capability of the network, there are two options to manage this:

1. Pay electricity generators on one side of the boundary to reduce the energy they produce. This then reduces the flows of electricity across the boundary. When National Grid ESO pay generators to do this, these are called ‘constraint payments’; and/or
    

2. Increase the capability of the network to allow more electricity to flow.

At present, generation in the region currently totals 4,100 MW. Most of this generation (3,160 MW) is directly connected to our network and 940 MW is connected via the UK Power Networks distribution network. We call the locally-connected generation ‘embedded’. 

The boundaries are indicated in the Electricity Ten Year Statement.

East Anglia GREEN would also connect new offshore wind farms off the Essex coast to the electricity transmission network. Two offshore wind farms – the North Falls Offshore Wind Farm and Five Estuaries Offshore Wind Farm – are currently in development. If they are consented, both are expected to be operational by the end of the decade. 

The Business Energy and Industrial Strategy (BEIS) department’s Offshore Transmission Network Review is currently looking at how the offshore electricity transmission network can be delivered in a more coordinated way to deliver net zero emissions by 2050, and we fully support that work. We will work closely with Government, stakeholders and coastal communities to ensure we play our part to deliver the infrastructure needed to achieve net zero in a way that reduces impacts on communities. 

In meeting that challenge there are two key considerations. The first is the way in which we best connect and coordinate the growth of offshore wind farms and interconnectors to the electricity transmission network along the immediate coastline. The second is the network reinforcements required further inland to accommodate the increased demand on the network and to ensure we can effectively transport the power to where it is needed across Great Britain. 

That offshore coordination work by Government is ongoing. As explained in the Energy White Paper, Government will be looking to redesign the current regime to bring more extensive coordination and mitigate environmental, social and economic costs for the 2030s and beyond. While developers will be encouraged, where early opportunities for coordination exist, to consider becoming pathfinder projects, National Grid ESO explains in the latest Network Options Assessment, that onshore reinforcement is still needed. The System Operator’s analysis found that the viable offshore options, in the scenario where 50 GW of offshore wind is achieved by 2030, do not displace any of the onshore reinforcement requirements that have been identified. 

The Pathway to 2030 Holistic Network Design (HND) for offshore wind projects was published in July 2022 and is available here. 

The HND provides a recommended onshore and offshore design for a 2030 network that can facilitate the UK Government ambition for 50 GW of offshore wind in Great Britain by 2030.  

The HND has been produced to ensure that all energy network infrastructure is designed and coordinated with optimum engineering solutions that also consider the economic, environmental and community impacts. 

In developing the HND, the National Grid ESO has brought together onshore and offshore network planning to allow the development of engineering solutions for the country’s transmission infrastructure that connects offshore wind projects to the network in a coordinated way.  

The objectives for the development of the HND were that it should be cost-efficient and deliverable, but also to minimise the impact new coordinated infrastructure has on communities and the environment.

Our current proposals are based upon the NOA that was published in January 2022. The NOA 2021/22 Refresh, which was published alongside the HND, identified East Anglia GREEN as a ‘HND essential option’ which reaffirms the ‘proceed’ signal that was given in the original document.

Offshore solutions were considered as part of our strategic proposal to upgrade the network in East Anglia. The Corridor Preliminary Routeing and Substation Siting study (CPRSS) examined several strategic options that were considered for East Anglia GREEN that might achieve the required reinforcement including offshore and subsea options. These options were not taken forward as they did not fully address technical or physical/geographical constraints, or enable the network to operate to the required standards.   

An offshore connection would have a third of the capacity of the proposed overhead connection. To transfer the anticipated levels of power generation, three offshore connections would be required along with associated infrastructure such as converter stations near the existing substations at Norwich Main substation and Tilbury.

We would also need to build onshore connections from the converter station sites to the coast. This scale of work would have its own environmental impacts and would cost substantially more than the onshore option we have taken forward. In view of this, we concluded that the onshore option best meets the obligations set out under our Licence and by Ofgem to be economic and efficient.

The technology does exist to transmit power through offshore cables, however the technology capacity limits of HVDC mean that for this project, multiple links would be needed to equate to onshore infrastructure.   

East Anglia GREEN is required to increase network capacity across multiple onshore power flow boundaries (see FAQ What are power boundaries on the national transmission system?) and the option we have taken forward provides a very low economic cost per MW compared to the multiple offshore HVDC links that would be required to match the capacity of this option. EAG crosses three onshore power boundaries, but being onshore it also connects into our Bramford substation roughly halfway along the route. This allows additional system flexibility that would not be delivered by a pure subsea connection. The advantages are that there are more ways the power can flow into the wider transmission network during maintenance or faults on the system. The onshore proposal has more links to the rest of the network as well as being economically lower cost to deliver. 

To achieve the same benefits as the proposed project an offshore option would still need to include onshore infrastructure including connections from Norwich, Bramford and Tilbury respectively to the coast, as well as multiple HVDC subsea cables links. At Norwich, Bramford and Tilbury and a new coastal substation respectively, there would also be a requirement for three converter stations at each site. This onshore work would reinforce the existing onshore transmission network and ensure that we can continue to operate the safely and securely with the increase of generation connecting in East Anglia.    

The energy National Policy Stations (NPS) set out the government’s policy for the delivery of energy infrastructure and provide the legal framework for planning decisions. They were first published in 2011. They provide guidance for the development of energy projects and provides the basis for examining applications for projects by the Infrastructure Planning Commission. 

They also include any other policies or circumstances that ministers consider should be taken into account in decisions on infrastructure development. 

They provide the framework within which Examining Authorities make their recommendations to the Secretary of State. 

To find out more, please see the Planning Inspectorate’s website here https://infrastructure.planninginspectorate.gov.uk/legislation-and-advice/national-policy-statements/  

The national policy statement (NPS) which covers building electricity networks infrastructure (EN-5) states that the government expects overhead lines will often be appropriate. It does, however, recognise that there will be cases where this is not so, for example, at particularly sensitive locations, where potential adverse landscape and visual impacts of an overhead line may make it unacceptable in planning terms, taking account of the specific local environment and context.  

East Anglia Green is a proposed reinforcement of the transmission network of approximately 180 km of new connection comprising 400 kV infrastructure, including pylons and conductors, between the existing substations at Norwich Main in Norfolk, Bramford in Suffolk, and Tilbury in Essex, with undergrounded cable through the Dedham Vale AONB. East Anglia Green will also connect new offshore wind generation – the North Falls Offshore Wind Farm and Five Estuaries Offshore Wind Farm. Both projects are in development and expected to be operational by 2030 if consented.

Works will also be required at the existing 400 kV substations at Norwich, Bramford and Tilbury, and cable sealing end (CSE) compounds will be required to connect sections of underground cable with the overhead infrastructure. 

The Government has set a target that by 2050 the UK will have net zero carbon emissions. In order to achieve this, and hit the targets along the way, such as connecting 50 GW of offshore wind by 2030, new infrastructure will be needed to deliver the increased energy production. This will include new overhead infrastructure, underground cables, cable sealing end compounds (where underground cables meet overhead infrastructure) and substations.  

The proposed route runs from the existing Norwich Main Substation, just south of Norwich, in a southerly direction passing to the west of Diss and continues south passing between Needham Market and Stowmarket to the existing substation at Bramford in Suffolk. From Bramford the route continues south easterly, passing through the Dedham Vale Area of Outstanding Natural Beauty and to a proposed site for a new substation near Lawford in Suffolk. From here the route heads west and passes round the north of Colchester before travelling south west between Braintree and Witham. The route passes around the north of Chelmsford, passing on the western side of Chelmsford and heading south with Writtle to the east of the route. The route continues south passing between Brentwood and Billericay and to the west of Basildon, ending to the east of Thurrock and connecting into the existing substation at Tilbury. 

When considering how to route a new line between Norwich and Tilbury, we looked at siting the new pylons close to the existing ones where there are existing routes. Our studies showed that we would need to divert around numerous existing homes and woodland which would require more robust angle pylons with additional visual and environmental effects. We feel the corridor we have put forward would have less impact.   

There are often a number of different ways that we could satisfy the need for a new connection, perhaps involving different locations, technologies or designs. Each time a new connection is needed, we have to make judgements about the best way to achieve it. 

In most cases a single preferred option will be identified. However, where it is not possible or appropriate to narrow down the selection to one preferred option, then more than one option may be taken forward. One option may perform better on technical and environmental grounds than another, but at much higher cost. In those cases, we need to make a judgement as to whether the additional benefits of the more expensive option justify the additional cost.   

Prior to our non-statutory consultation a number of strategic and routeing options for East Anglia GREEN were identified and evaluated. These options were identified as being appropriate to achieve the required reinforcement and included consideration of onshore routes, offshore and subsea options.   

We will generally consider options to have an advantage if:  

• we can use or adapt existing infrastructure, or where we can negotiate different commercial arrangements with our customers to achieve a need, rather than building new infrastructure 

• they are shorter, compared with longer routes  

• they are financially less expensive compared to other more expensive options 

• they avoid or mitigate environmental or socio-economic impacts. 

We then compared the technically feasible options to inform the selection of preferred option(s).  

The option we have taken forward best meets the technical and physical/geographical constraints and enables the network to operate to the required standards.  More information on these options and the process of consideration can be found in our Corridor Preliminary Routeing and Siting Study, available to view here - https://www.nationalgrid.com/electricity-transmission/document/142461/download. 

We will continue to back-check and review the performance of all our options at each stage of our proposals to understand if there has been a material change.

We are already carrying out work to achieve more capability by upgrading and strengthening the existing network. In East Anglia and in the first half of this decade, we are:  

• installing power control devices at key substations in the region – at Pelham, Rye House and Waltham Cross, to make more use of an existing route to the west of the region  

• increasing the voltage of a section of line from Waltham Cross south into London to 400 kV to increase the capability of that part of the network into the capital   

• re-wiring existing overhead lines with conductors that can carry more power – for example on the existing overhead infrastrcuture from Bramford to Braintree to Rayleigh to Tilbury, Twinstead and Pelham and between Norwich and Bramford.   

Making these improvements will increase the capability of the existing network, but it will still be insufficient to deliver the capability that National Grid ESO advises is required to deliver cleaner, greener energy to homes and businesses beyond the region in line with Government ambitions.  

The existing pylons cannot be further adapted safely and securely to enable them to carry more power or additional conductors (wires) to take the amount of power being proposed in East Anglia. 

Our preliminary work indicated that the route should be underground in the protected area of the Dedham Vale Area of Outstanding Natural Beauty (AONB). In all other areas we are currently proposing to build pylons.

Your feedback is important to us and helps identify locations to consider for additional mitigation such as undergrounding. We are reviewing your suggestions and the outcome of this work will be presented at our next consultation.

As part of our non-statutory consultation in 2023, we will publish a draft indicative alignment which will show proposed locations for pylons, underground cables, cable sealing end compounds and connection substations. And we will explain how consultation feedback, along with the findings of surveys and assessments, have informed our decision making to date.

We are still at an early stage of the project and have not yet identified locations for where the cables will transition to overhead outside the Dedham Vale AONB.    

Where the transition is made from underground to overhead infrastructure, we will need to build a cable sealing end compound to ensure that the transition can be made safely (this is likely to be roughly 50m by 50m in size). We will show proposed locations for cable sealing end compounds at our next consultation in 2023.  We are carrying out assessments to identify potential locations, and are considering a range of factors including landscape and visual impact, cultural heritage and ecology to inform our decision making.

The compound would be fenced and would be subject to screening works, including planting around the perimeter. Once the cables have been laid, the land above will be able to return to normal agricultural use as the cables are buried approximately a meter below the ground. Hedgerows would be reinstated but trees would not be able to be planted over the cable as their roots could interfere with the cables' operation. 

We need to connect two new offshore windfarms to the national transmission network.  These new windfarms are being developed by North Falls Offshore Windfarm Limited and Five Estuaries Offshore wind farm respectively. Both windfarms are sited off the East Anglia coast and need connection to the network to take the power that they will generate to the homes and businesses where it will be used.  

Before a route away from Bramford substation was identified, a number of potential locations for the connection substation were considered. The Tendring Peninsula is bounded by estuaries to the north and south-west which, along with Hamford Water to the east, are internationally protected for wildlife. The windfarm export cables will come ashore to align to the area, nominally between Clacton and Frinton-on-Sea. There is currently an existing 132 kV line in the middle of the area, between substations near Lawford and Clacton.      

Our preferred connection substation site is in the vicinity of the existing 132 kV substation to the south of Lawford. The site, when considered with the electrical connections required to it (two 400 kV lines and windfarm export cables), is preferred in terms of ecology, landscape impact, technical considerations and cost. This is because as it is furthest from the protected wildlife sites, and as such is less likely to affect the bird populations in this location.    

We are proposing using standard steel lattice pylons which are approximately 45 - 50 m in height. Taller pylons may be required in some locations depending on the local topography and also to avoid sensitive features. 

We are still at an early stage of the project and need to carry out more detailed assessments before we can confirm where and how many pylons are needed. 

As we scope our projects, we consider numerous technology solutions. An offshore solution was considered as part of our initial strategic proposal to upgrade the network in East Anglia, and that work was summarised in our Corridor Preliminary Routeing and Substation Siting study (CPRSS). National Grid’s appraisals were based on our knowledge of the network and understanding of the capacity and costs of developing subsea links.

New low carbon generation is already in the process of connecting into the Norwich area and therefore an offshore connection would need to take the power from there to the Tilbury area.

An offshore connection would have a third of the capacity of the proposed overhead connection. To transfer the anticipated levels of power generation, three offshore connections would be required along with associated infrastructure such as converter stations near the existing substations at Norwich Main substation and Tilbury.

We would also need to build onshore connections from the converter station sites to the coast. This scale of work would have its own environmental impacts and would cost substantially more than the onshore option we have taken forward. In view of this, we concluded that the onshore option best meets the obligations set out under our Licence and by Ofgem to be economic and efficient.

We understand that most people prefer a connection in the sea, particularly because of the benefits it would have for the landscape and views. However, the impacts to the marine environment are equally important when considering using subsea connections and must be evaluated fully. We look at a number of options when considering a new connection, and if appropriate to geographical location (proximity to the coast) we will consider and evaluate offshore alternatives. As the cost of all connections ultimately goes onto the electricity bills of domestic and business consumers, the UK government and our regulator Ofgem require us to develop proposals which represent value for money to consumers. Often subsea cables can be more expensive and do not meet our regulatory duties to provide value to consumers or prove the most effective way to get electricity to the onshore consumers located away from the coast. Our evaluation of the alternatives for this project found that subsea options do not represent the best value or most effective way to deliver the electricity needed by our homes, businesses, or transport. 

As part of our solution in East Anglia we are proposing an offshore reinforcement in East Anglia (Sea Link), along with other additional onshore electricity lines such as the Bramford to Twinstead reinforcement. These reinforcements alone do not deliver the additional capacity required to the network in the region.    

We are required under the Electricity Act 1989, to find a balance, developing proposals that are efficient, coordinated and economical, and which have regard to people and places. Each network upgrade must be considered on its individual merits, as required in planning law. 
 
The national policy statement (NPS) which covers building electricity networks infrastructure (EN-5) states that the government expects overhead lines will often be appropriate. It does, however, recognise that there will be cases where this is not so, for example, at particularly sensitive locations, where potential adverse landscape and visual impacts of an overhead line may make it unacceptable in planning terms, taking account of the specific local environment and context.    
 
National Grid’s duties and obligations include balancing the need to be economic and efficient, which includes keeping costs down in the interests of the bill-paying consumers, with a duty to have regard to preserving amenity, which includes the natural environment, cultural heritage, landscape and visual quality.   
 
Our preliminary work indicated that the route should be underground in the protected area of the Dedham Vale Area of Outstanding Natural Beauty (AONB).

Your feedback is important to us and helps identify locations to consider for additional mitigation such as undergrounding. We are reviewing your suggestions and the outcome of this work will be presented at our next consultation.

At our first public consultation we were primarily consulting on the preferred corridor and graduated swathe, and to inform this we had assumed use of steel lattice pylons at this time.

Alternative designs include lower-height lattice pylons, which are shorter but wider versions of the regular lattice designs, and the mono-pole ‘T-pylon’ which is being used on the Hinkley Connection Project. These will be considered as we further progress the project.

We are still at an early stage of the project and need to carry out more detailed assessments before we can confirm where and how many pylons are needed.  

The pylons are designed to have a minimum lifespan of 40 years, subject to annual inspection. Refurbishment could extend the lifespan of pylons. 

The existing high-voltage transmission network was developed in the 1950/60s. Planning policy since that time has changed significantly and allows for greater protection of valued landscapes such as AONBs and National Parks. Recognising this, Ofgem have made available funding of £500m to carry out work to reduce the impact of existing transmission lines in English and Welsh AONBs and National Parks.  The first of these funded projects are Dorset, Snowdonia and the Peak District.   

East Anglia GREEN is being developed in accordance with the current NPS, which covers building electricity networks infrastructure (EN-5) and which states that the government expects overhead lines will often be appropriate. It does, however, recognise that there will be cases where this is not, for example, at particularly sensitive locations, where potential adverse landscape and visual impacts of an overhead line may make it unacceptable in planning terms, taking account of the specific local environment and context.   

Our preliminary work indicated that the route should be underground in the protected area of the Dedham Vale Area of Outstanding Natural Beauty (AONB).

Your feedback is important to us and helps identify locations to consider for additional mitigation such as undergrounding. We are reviewing your suggestions and the outcome of this work will be presented at our next consultation

The proposed reinforcement is at 400kV and the power rating is 6GW.

The current proposals for the Bramford to Twinstead reinforcement were included in our initial baseline assessments. At our statutory consultation in 2024, we will publish the Environmental Impact Assessment for East Anglia GREEN. This will include a cumulative effects assessment, which will consider the cumulative effects between the East Anglia GREEN reinforcement and other proposed developments in the area, including the Bramford to Twinstead reinforcement. 

We are currently undertaking further surveys, assessments and designs. We will consult on our proposals again in 2023. We will then need to do a full environmental impact assessment and further refine the design and plan to submit an application for a development consent order to the Planning Inspectorate in 2024. If we are granted consent we will be starting work on site in 2026 with further site survey and construction work will commence in 2027 and is projected to be complete at the end of 2030 to enable the new connection to be operational from early 2031. 

The System Operator, National Grid ESO, leads an annual process looking at how the electricity transmission network might need to adapt to likely changes to where the electricity we all use will come from. That starts with stakeholder discussions and analysis about potential Future Energy Scenarios which are published each summer. The System Operator takes those different scenarios and looks at what that might mean for the transmission network over the next ten years, publishing an Electricity Ten Year Statement each November. The transmission network owners, including National Grid Electricity Transmission, respond to the issues outlined in the Electricity Ten Year Statement with suggestions as to how those can be addressed. Then in January each year, National Grid ESO publishes a document known as the Network Options Assessment (NOA), which outlines their recommendations as to which reinforcement projects should be taken forward during the coming year to meet the future network requirements. 

A need was identified to resolve electrical boundary issues in East Anglia. There are three onshore power boundaries where additional system flexibility is required to ensure that power generated in the area from offshore windfarms and nuclear generation has more ways to flow into the wider transmission network during maintenance or faults on the system.   

In addition, two new offshore windfarms off the Suffolk/Essex coast need to be connected to the transmission network to transport the low carbon energy they will produce to the homes and businesses where it will be used. 

The NOA 2021 identified need for an upgrade to the existing line in East Anglia in all future energy scenarios and this was confirmed in NOA 22. You can read more about the latest NOA report here. 

The Network Options Assessment (NOA) 2021/22 confirmed that East Anglia Green is critical in all future energy scenarios. The System Operator also explained in NOA that the need for critical reinforcements such as this project are likely to be reinforced by the Holistic Network Design (HND).  

The HND, which is supported by National Grid Electricity Transmission, has been produced to ensure that all energy network infrastructure is designed and coordinated considering economic, environmental and community impacts. A refreshed NOA was published by the System Operator in June 2022 alongside publication of the HND. In this document, East Anglia GREEN was identified as a ‘HND essential option’.

Our project is required to increase network capacity across multiple onshore power flow boundaries and the option we have taken forward provides a very low economic cost per MW compared to the multiple offshore HVDC links that would be required to match the capacity of this option. EAG crosses three onshore power boundaries, but being onshore it also connects into our Bramford substation roughly halfway along the route. This allows additional system flexibility that would not be delivered by a pure offshore connection. The advantages are that there are more ways the power can flow into the wider transmission network during maintenance or faults on the system.  The onshore proposal has more linkages to the rest of the network as well as being economically lower cost to deliver. 

Routeing studies are carried out to identify broad potential corridors for the new transmission route. Similar siting studies are carried out to identify suitable locations for infrastructure, such as substations or converter stations if required. When routeing overhead infrastructure, we apply the Holford Rules and start to consider the types of mitigation that could offset any landscape or visual effects.  

The studies carried out to this point, are used to identify the preferred route corridor or corridors. In cases where we have previously chosen a predominantly overhead option, we may propose a fully overhead corridor or a route corridor which is a mixture of overhead and underground technologies, depending upon the constraints identified. Candidates for undergrounding might include: locations with physical difficulties in constructing overhead infrastructure (such as in urban areas); wide river or estuary crossings; the presence of highly valued landscapes (which include National Parks and AONBs but could also include particularly sensitive landscapes and iconic views or areas where other potential impacts could only be mitigated by undergrounding). This is not an exhaustive list, and all projects will be considered on a case-by-case basis. If the preferred route corridor is predominantly overhead infrastructure, there will still be a continuing process of appraisal and consultation as the project develops, as a result of which we may propose undergrounding certain sections of the route.   

We will continue to backcheck and review our decisions at each stage and as we review consultation feedback and will publish how feedback has informed the shape of the project when we submit an application for planning consent. 

Obtaining valuable stakeholder feedback is crucial to us developing the right project in the right location. Our process and approach ensure we take into account information at the right time to shape and influence our proposals.  

For DCO projects, there is an obligation for us to demonstrate how we have taken feedback into account in developing the project. We explain this within our consultation feedback report, which will accompany our DCO application.  

There are three types of consenting regime:  

• DCO which is for new overhead infrastructure longer than 2km in length. 

• Town and Country planning permission for substations (we can use permitted development rights for some works).  

• Electricity Act consent for certain overhead infrastructure works less than 2km in length (we can use certain exemption regulations).  

The new connection will be a Nationally Significant Infrastructure Project, which requires the consent of the Secretary of State for Business, Energy and Industrial Strategy. Before we apply for consent, we’ll be consulting local stakeholders and scrutinising the feedback we receive to help shape our proposals. The Planning Inspectorate will then consider our application and make a recommendation to the Secretary of State, who ultimately decides whether consent should be granted.  

Nationally Significant Infrastructure Projects (NSIP) are major infrastructure developments in England and Wales that require government approval rather than local authority approval. For National Grid Electricity Transmission, this is for new overhead infrastructure which are over 2km in length.  

A Development Consent Order (DCO) application is required for an NSIP project. The application is made to the Planning Inspectorate, who hold hearings to examine the proposals and make a recommendation to the Secretary of State. The minister will decide on whether development consent should be granted for the proposed project.  

In addition to development consent, a DCO can contain powers for compulsory acquisition, the need for which will be considered as part of the examination of the DCO.  

NSIPs are consented under the Planning Act, which requires mandatory pre-application consultation, which we will undertake for all DCO projects.  

The Development Consent Order process has six key stages:  

• pre-application  

• acceptance 

• pre-examination  

• examination  

• decision  

• post-decision  

On receipt of an application for development consent, the Planning Inspectorate has 28 days to decide whether to accept it or not. There is then usually a period of around 3-4 months before the examination starts, and then a period of up to six months for the Planning Inspectorate to examine an application and up to three months for the Planning Inspectorate to make its recommendation to the Secretary of State. The Secretary of State has a further period of up to three months in which to issue a decision. The whole process from the date of application should take about 15-18 months.  

For more information, please see The Planning Inspectorate’s guide to the DCO process.  

The planning process requires us to seek advice and guidance from the Planning Inspectorate on the scope and level of detail of the technical environmental information to be provided in the Environmental Statement that will support our application for a Development consent Order. This is called ‘scoping’. We submitted a request for a Scoping Opinion to The Planning Inspectorate in November 2022 who, in turn, consulted with technical stakeholders including Local Authorities, Natural England and English Heritage to inform their response. The Scoping Opinion was published in December 2022. We are using this Opinion to shape the environmental assessment of our proposals.

National Grid undertakes a multi-phase process to ensure that stakeholder feedback helps shape the location and design of our projects. 

Our process meets the requirements of the planning act and statutory duties and our commitments when developing infrastructure projects, which are set out in our Stakeholder, Community and Amenity policy.  

For more information, please see our Approach to Options Appraisal document.  

Before we formally consult the public, we discuss how we plan to do that with the local authorities so that they can comment on how, when and with whom, to ensure local concerns are addressed. If the project requires a DCO, we then set out our approach at the statutory consultation stage in a Statement of Community Consultation.  

We have our approach to consenting which is developed for DCO projects but is similar for town and country planning applications.  

Obtaining valuable stakeholder feedback is crucial to us developing the right project in the right location. Our process and approach ensure we take into account information at the right time to shape and influence our proposals.  

For DCO projects, there is an obligation for us to demonstrate how we have taken feedback into account in developing the project. We explain this within our consultation feedback report, which will accompany our DCO application.  

Once the application for development consent has been submitted and the project is in the pre-examination stage of the Development Consent Order process, the public will be able to register with the Planning Inspectorate to become an interested party and they are able to make a relevant representation.  

For more information, please see The Planning Inspectorate’s guide to how to participate.  

House prices depend on a number of different factors – it is difficult to single out any one factor that will affect house prices. We do recognise that the visual impact of any new overhead infrastructure is likely to be a significant issue for many local communities, so we always try to avoid communities and individual properties as much as possible. 

If anyone has specific concerns, we encourage you to contact us to talk about these.

UK law does not require us to compensate for loss of view. However, we do recognise that the visual impact of any new overhead infrastructure is likely to be a significant issue for many local communities, so we always try to avoid communities and individual properties as much as possible. 

The government has committed to a consultation on how local communities can benefit from the development of network infrastructure in their area.  We welcome this recognition of the importance of those communities and would encourage any impacted stakeholders to respond to the consultation so that the government can hear their views directly. 

UK law does not prescribe any minimum distance between overhead equipment and properties. However, National Grid’s approach to routeing new overhead infrastructure is to try to avoid communities and individual properties as much as possible and maximise the distance between proposed new overhead infrastructure and properties.  

National Grid will always ensure minimum electrical distances from overhead equipment.

We held our first stage of consultation in spring 2022. This non-statutory public consultation was to seek feedback on our preferred corridor and graduated swathe, along with the preferred location of the proposed new substation in Tendring District. 

As part of our ongoing commitment to stakeholder engagement, we will hold our next public non-statutory consultation on emerging proposals in 2023. We will publish a draft indicative alignment which will show proposed locations for pylons, underground cables, cable sealing end compounds and connection substations. And we will explain how consultation feedback, along with the findings of surveys and assessments, have informed our decision making to date.

More information about the consultations, including dates and how to participate will be published nearer the time. You can stay updated on our project by registering your email on our website or calling us on 0800 151 0992.

To support the non-statutory consultation held in spring 2022 we produced the following documents which are available to view in our document library: 

• Project Background Document – providing an overview of the project and detailing our proposals and how we are consulting 

• Corridor Preliminary Routeing and Siting report – providing more technical information on the project and the need for the project, the options considered, the routing and siting options assessed and our preferred options 

• overview map and individual route section maps showing the location of the preferred route and the graduated swathe 

• newsletter summarising details of the project and public consultation 

• response form – to gather comments and feedback. 

Before we formally consult the public, we discuss how we plan to do that with the local authorities so that they can comment on how, when and with whom, to ensure local concerns are addressed. If the project requires a DCO, we then set out our approach at the statutory consultation stage in a Statement of Community Consultation.  

We have our approach to consenting which is developed for DCO projects but is similar for town and country planning applications.  

For more information, please see our Approach to Consenting and Stakeholder, Community and Amenity document.  

The feedback received during the non-statutory consultation has helped  us shape our project and we are expect to be in a position to share our emerging proposals at a further non-statutory consultation in 2023.

At this consultation we will  ask for feedback on the draft indicative alignment and if there is anything else we should consider as we further develop the project.

Following this we will hold a statutory public consultation which will show how we have developed the design of the project further and we will set out how your feedback has influenced our decision-making. This will be in accordance with the requirements of the Planning Act 2008.

After we have completed the statutory consultation, we will collate and analyse all feedback received and take this into account as we refine the project design. We will then prepare and publish a Consultation Report, which will summarise the feedback we have received and outline how we carried out both the non-statutory and statutory consultations. 

Consultation is important to us as to allow members of the public to influence the way project is developed by providing feedback and to help local people understand better what a particular project means for them, so that concerns resulting from misunderstandings are resolved early. It also helps to identify potential mitigating measures to be considered and, in some cases, built into the project before an application is submitted.  

Obtaining valuable stakeholder feedback is crucial to us developing the right project in the right location. Our process and approach ensure we take into account information at the right time to shape and influence our proposals. 

For DCO projects, there is an obligation for us to demonstrate how we have taken feedback into account in developing the project. We explain this within our consultation feedback report, which will accompany our DCO application.  

In 2023 we will hold a further non-statutory consultation when we will ask for feedback on the draft indicative alignment and if there is anything else we should consider as we further develop the project.

Following this we will hold a statutory public consultation in 2024 which will show how we have developed the design of the project further and how your feedback has influenced our decision-making. This will be in accordance with the requirements of the Planning Act 2008. If following the statutory consultation further changes need to be made to the project, we may carry out further targeted statutory consultation. 

Once the application for development consent has been submitted and the project is in the pre-examination stage of the Development Consent Order process, the public will be able to register with the Planning Inspectorate to become an interested party and they are able to make a relevant representation.  

Once the application for development consent has been submitted and the project is in the pre-examination stage of the Development Consent Order process, the public will be able to register with the Planning Inspectorate to become an interested party and they are able to make a relevant representation.  

For more information, please see The Planning Inspectorate’s guide to how to participate.  

Net zero refers to achieving a balance between the amount of greenhouse gas emissions produced and the amount removed from the atmosphere. The term net zero is important because – for CO₂ at least – this is the state at which global warming stops.  

In 2015, the UK Government adopted The Paris Agreement, a legally binding international treaty on climate change. Its goal is to limit global warming to well below 2, preferably to 1.5 degrees Celsius, compared to pre-industrial levels. To achieve this long-term temperature goal, countries are working towards net zero to achieve a climate neutral world by mid-century.  

In 2019 government, the UK government became the first major economy in the world to enshrine in law its commitment to end its contribution to global warming by 2050. The target will require the UK to bring all greenhouse gas emissions to net zero by 2050, compared with the previous target of at least 80% reduction from 1990 levels. 

The Government has made it clear that a key part of the pandemic recovery is building back cleaner and greener. The UK has set a world-leading target to tackle climate change, which is to achieve net zero by 2050. Put simply, this means that we remove the same amount of greenhouse gas from the atmosphere as we produce.  

Growth in the amount of energy generated from offshore wind is a key part of achieving net zero and the Government’s Energy White Paper sets an ambitious target to deliver 40GW of offshore wind connected to the network by 2030 – enough to power every home in the UK. National Grid will play a vital role, ensuring that the high-voltage network can carry this cleaner, greener energy across the country to where it is needed. 

Growth in offshore wind also offers significant opportunities for economic growth and job creation. There are up to 60,000 jobs expected to be created in the offshore wind sector alone in this decade, and up to 250,000 jobs by 2030 across the proposals in the Government's ‘Ten Point Plan for a Green Industrial Revolution’. By 2050, our own analysis indicates that the energy sector needs to fill around 400,000 jobs to build the Net zero energy workforce.  

The Climate Change Committee anticipate the demand for low-carbon electricity will at least double by 2050 from 2019 levels as we shift to clean energy to drive electric vehicles, heat our homes and power our industry. The Committee’s Sixth Carbon Budget published in December 2020 recommends deploying 40GW of offshore wind by 2030, rising to maybe as much as 140GW of offshore wind by 2050.  

Our mission at National Grid is to support these aims. We believe by acting now, the UK can become the world’s first major clean economy, with net zero carbon emissions by 2050, creating growth and jobs for communities across Great Britain. 

Whilst the biggest impact we can have is supporting the economy-wide clean energy transition, it is important that we also reduce emissions from our own operations. Our work involves building and maintaining the electricity transmission network. In our role as an infrastructure business, it is vital that we decarbonise our own network. We want to operate in an environmentally sustainable way because we know that it’s the right thing to do – for society, the environment and our business. 

We will reduce scope 1 and 2 emissions in line with 1.5-degree science-based targets – 34% reduction by 2026, 50% reduction by 2030 from a 2018 baseline and we will be net zero by 2050. We will also deliver carbon neutral construction by 2026. 

At the beginning of each reinforcement and as we plan the work, we carefully consider potential environmental effects to ensure that we avoid or reduce potential significant effects on the environment. We are consulting with local authorities in the area, alongside the Environment Agency, Natural England, Historic England, landowners and other relevant stakeholders and organisations. What these groups tell us and the feedback we receive through the consultations will help us to carefully plan our proposals and how we carry out the works.  

Our Environmental Action Plan is our handbook which details our ambitions to further reduce our carbon emissions, reduce our resource use, improve our natural environment and demonstrate leadership for change.  

National Grid will always consider and assess the likely significant environmental effects of our projects. In some cases, National Grid will complete an Environmental Impact Assessment (EIA). The EIA includes a number of baseline studies which tell us about the baseline environment within the area and this factors into our design and decision-making process, so that we seek to avoid and reduce impacts on the environment. In other instances, we will include information about the appraisal of likely significant environmental effects and how those will be addressed, with our consent applications. 

The term biodiversity net gain means increasing the amount of biodiversity in an area than currently exists.  

National Grid value nature and will protect and enhance it where possible using ‘natural capital’ and ‘net gain’ principles. National Grid has made a commitment to deliver at least 10% biodiversity net gain (BNG) where we are planning new network reinforcements, and where possible we aspire to achieve a 15% net gain. This means that the habitat value for wildlife will be increased by at least 10% once the reinforcement is complete, compared to what currently exists. On our projects we work with appointed technical specialists, environmental organisations and landowners to identify potential opportunities for delivering environmental gains. 

We will carry out environmental surveys, including habitat surveys and protected species surveys and the results will help inform the design and decision-making process as we finalise our plans for the reinforcement. We will always consider likely significant impacts to habitats and species and any measures required to mitigate or reduce the effects. National Grid || Environmental Sustainability Issue 2: March 2022 4 For major projects, the results of our wildlife assessment will be presented within the Environmental Statement, which will be submitted with the application for development consent. The initial results of the assessment will be found in the Preliminary Environmental Information Report published as part of the statutory consultation material. 

National Grid Electricity Transmission Environmental Action Plan – https://www.nationalgrid.com/uk/electricity-transmission/document/136551/download 

National Grid Electricity Transmission Stakeholder, Community and Amenity Policy - https://www.nationalgrid.com/uk/electricity-transmission/document/81026/download 

National Grid, Responsibility - https://www.nationalgrid.com/responsibility 

As we develop the proposals for the project we will consider potential effects on local traffic and will provide information on this at our next consultation. 

To support our application for a Development Consent Order we will prepare an Environmental Impact Assessment which will consider traffic and transport effects of our defined proposals. We will also prepare an Outline Construction Traffic Management Plan will be prepared as part of the application for Development Consent. This will set out the good practice measures proposed to further reduce impacts on the local road network and traffic. It will include measures providing clear signage to make sure our construction traffic uses the agreed routes and construction workers using public transport and car sharing where practicable. We emphasise to our employees and contractors the special care that they need to take when driving to and from the areas we are working in. 

We will carry out a noise assessment to support our application for a Development Consent Order, which will identify areas where there could be the potential for significant noise effects. In these areas, there may be the need for mitigation such as noise barriers to reduce noise during construction. Further details will be set out within the Outline Construction Environmental Management Plan submitted with the application for development consent. 

There is likely to be some effects on air quality during construction due to the number of construction vehicles and equipment including generators. Dust may also be generated during construction, due to soil stripping and vehicles tracking on the haul routes. The good practice measures set out within the Outline Code of Construction Practice, such as turning off machinery when not in use and locating equipment away from sensitive features, would reduce the effects on air quality. With such measures in place, there are unlikely to be any significant effects on air quality during construction. 

No. The work will have no impact on your electricity supply. The work that we need to carry out is on part of the national transmission system and will have no direct effect on homes, businesses, schools and other premises in the local area.  

For the safety of members of the public and our contractors we may need to close some public rights of way and roads temporarily when carrying out work. We will seek to provide alternative diversions and to keep the closure as short as practicable. The closures and any required diversions will be agreed with the local authorities and clearly communicated to local people. 

When reinforcement to the network is needed, we carefully assess the impact this could have on local people, communities and the local economy. In determining where new connections and infrastructure may be situated, we try to avoid or reduce adverse impacts. We analyse the possible effects of new infrastructure on local economic activity, traffic and transport, and aviation and defence, and we take account of a wide range of environmental factors, including sites, areas and features of tourism value. 

National Grid are at the heart of the UK’s transition to a clean, green electricity network. During construction, we will work with our suppliers to develop opportunities for local employment and to bring benefit to the local economy through our projects. There are also huge opportunities in the renewable energy sector that our proposals support.  

As the Government explain in the Energy White Paper, fighting climate change offers huge opportunity for growth and job creation. The global markets for low-carbon technologies, electric vehicles and clean energy are fast growing. The Government estimate zero emission vehicles could support 40,000 jobs by 2030 and 50 GW of offshore wind in the same period will support up to 60,000 jobs. Altogether the UK Government’s Net Zero Strategy sets out a vision that will support up to 440,000 jobs by 2030 and see every home in the country powered by offshore wind. Our own analysis in our Job That Can’t Wait report, shows that the country needs to fill 400,000 jobs in the energy sector in the next three decades to deliver Net Zero by 2050.  

At National Grid we are investing around £1.3 billion every year, wiring up our communities to the next generation clean electricity network, so that every household can be powered by renewable energy by 2030. Where we are delivering those network investments, aside from opportunities for local suppliers, we work with schools and local authorities to encourage the next generation of engineers and help the long term unemployed develop new skills.  

When operating in an area, we have a Community Grant Programme which offers grants to local community groups and charities. This allows local charities and not-for-profit groups to apply for support for community based initiatives that deliver social, economic, or environmental benefits.  

We know people are concerned about the potential socioeconomic impact of our projects, and we always ensure that local concerns are addressed. However, we do not believe our project will have a severe socioeconomic impact. Independent academic study has shown that for most people and businesses living and working next to National Grid infrastructure, there is little or no socioeconomic impact from new or existing infrastructure. 

We know that our responsibility as a business goes beyond safely building new energy infrastructure to enable a cleaner, fairer and affordable future.  We want to leave a lasting positive impact where we build our projects, to help those areas and communities thrive and to support a sustainable future.

We are working with stakeholders and communities to understand what is important to them and will endeavour to deliver initiatives in the region to support those priorities. There are four key areas where we believe we can bring benefit to those who are hosting the infrastructure that supports the green energy transition:

• Natural Environment – we will build partnerships with environmental groups and NGOs where we can support initiatives that enhance the landscape, biodiversity and availability of green space within the areas we are constructing our projects.

• Net Zero – we will help to support the region in achieving its own net zero priorities.

• Skills and employment – we are extending our Grid for Good programme to deliver training and skills development in the region, to encourage the next generation of green energy workers

• Community Grant Programme – when projects are in construction, through our Community Grant Programme, charities and not- for- profit organisations can apply for a grant towards community-based initiatives that deliver social, economic and environmental benefits.

This onshore work would reinforce the existing on shore transmission network and ensure that we can continue to operate the transmission network safely and securely with the increase of generation connecting in East Anglia. 

The East Anglia GREEN connection is essential to support the growth in clean green energy from North Sea offshore wind. We will all benefit from that clean green energy and some will be consumed in East Anglia.

National Grid are at the heart of the UK’s transition to a clean, green electricity network. During construction, we will work with our suppliers to develop opportunities for local employment and to bring benefit to the local economy through our projects. There are also huge opportunities in the renewable energy sector that our proposals support. As the Government explain in the Energy White Paper, fighting climate change offers huge opportunity for growth and job creation. The global markets for low-carbon technologies, electric vehicles and clean energy are fast growing. The Government estimate zero emission vehicles could support 40,000 jobs by 2030 and 40GW of offshore wind in the same period will support up to 60,000 jobs. Altogether the UK Government’s Net Zero Strategy sets out a vision that will support up to 440,000 jobs by 2030 and see every home in the country powered by offshore wind.  

Our own analysis in our Job That Can’t Wait report, shows that the country needs to fill 400,000 jobs in the energy sector in the next three decades to deliver net zero by 2050. At National Grid we are investing around £1.3 billion every year, wiring up our communities to the next generation clean electricity network, so that every household can be powered by renewable energy by 2030. Where we are delivering those network investments, aside from opportunities for local suppliers, we work with schools and local authorities to encourage the next generation of engineers and help the long term unemployed develop new skills.

When operating in an area, we have a Community Grant Programme which offers grants to local community groups and charities. This allows local charities and not-for-profit groups to apply for support for community based initiatives that deliver social, economic, or environmental benefits.  

National Grid’s Community Grant Programme is aimed at community organisations and charities in areas where National Grid’s work is impacting on local people through our operations and site activities. We fund projects run by charities and community groups that meet local community needs by providing a range of social, economic and environmental benefits.  

To apply for a community grant, your project must be in an area affected by our operations or activities – but your organisation may be based elsewhere. We welcome applications from registered charities, social enterprises, and non-profit organisations. For more information, please visit our Community Grant Programme page. 

We support projects in the following areas:  

Social benefits  

• Initiatives that support hard-to-reach members of the community improving diversity and inclusion.  

• Initiatives that support community safety – from gas or electricity safety to protecting at-risk members of society including the elderly and those with special needs.  

• Initiatives which achieve improved educational attainment through building confidence and self-esteem of children and young people.  

• Education projects especially those that upskill young people with STEM (Science, Technology, Engineering, Maths) skills.  

• Activities that promote or support health and wellbeing in the local community, for example addressing energy efficiency. Economic benefits  

• Initiatives that support employment either through a work placement or retraining schemes which increase the employability of people from lower income communities back into the workplace. 

• Initiatives that support capacity building for community, charity or voluntary groups to help them improve their services, whether it be reaching more users or extending the hours that the service is available.  

Environmental benefits  

• Initiatives such as conservation projects that have a direct and positive environmental impact or awareness raising projects that improve environmental behaviour or understanding from recycling to water resource management 

• Improvement of the energy efficiency of community facilities.  

Initiatives which help people to manage their energy usage and access affordable tariffs. 

National Grid’s Community Grant Programme funds projects in communities affected by our operations. We prefer to receive applications online through our Community Grant application form but if you are unable to do this, please call our Community Helpline on 01285 841912 and they will be able to help you. We will acknowledge your application and you may be contacted by a grants officer to provide additional details. We accept applications on a quarterly basis (see timeline below). These are then checked against minimum requirements and passed on to be reviewed by a National Grid funding panel, where all applications received will be assessed and scored against evaluation criteria. The highest scoring applications will be awarded funding. You will be notified of the outcome once a decision has been made. If you are successful, we will give you further information and ask you to provide your bank details. Grants are normally paid directly into your organisation’s bank account. If you are unsuccessful, we will let you know. After 12 months, or once your project is complete, we will ask you to report back on progress, confirming how the grant has been used and the impact that has been achieved. 

Annual timeline  

• Q1 Apr – Application window opens; May – Applications reviewed against criteria; June – Panel session/ decisions  

• Q2 July – Application window opens; Aug - Applications reviewed against criteria; Sept - Panel session/ decisions  

• Q3 Oct – Application window opens; Nov - Applications reviewed against criteria; Dec - Panel session/ decisions  

• Q4 Jan – Application window opens; Feb - Applications reviewed against criteria; Mar - Panel session/ decisions  

We have an independent panel that assesses the applications against the criteria that has been provided. This ensures that the Community Grant Fund is distributed. We report on our website any applications that have been successful and awarded. 

EMFs are electric and magnetic fields. Electric fields are produced by voltage and magnetic fields by current flowing through a conductor. Overhead infrastructure is a source of two fields: the electric field (produced by the voltage) and the magnetic field (produced by the current). Underground cables eliminate the electric field altogether as it is screened out by the sheath around the cable, but they still produce magnetic fields. 

Background EMFs are present in most homes. They come from the house wiring, electrical appliances and the low-voltage distribution cables that carry electricity along streets.  

EMFs are produced wherever electricity is used or transmitted. They are produced by household wiring, electrical appliances, low-voltage distribution cables that carry electricity along streets and by high voltage power lines and substations.  

Electric fields depend on the operating voltage of the equipment producing them and are measured in V/m (Volts per metre). The voltage applied to equipment is a relatively constant value. Electric fields are shielded by most common building materials, trees, and fences. Electric fields diminish rapidly with distance from the source.   

Magnetic fields depend on the electrical currents flowing, which vary according to the electrical power requirement at any given time and are measured in μT (microteslas). They are not significantly shielded by most common building materials or trees. Magnetic fields diminish rapidly with distance from the source.

National Grid takes the issue of health very seriously and relies on authoritative and independent scientific organisations, such as the World Health Organization (WHO) and the UK Health Security Agency (UKHSA), to review the worldwide body of scientific evidence on electric and magnetic fields (EMFs) and health, as well as reviewing the science ourselves.  

Health considerations are given a high priority in the process by which we arrive at any proposals for new routes for electricity connections. Our approach is to ensure that all our assets comply with the guidelines set by Government on advice from the UK Health Security Agency (UKHSA). A vast amount of research has been done into the possibility of health effects, without establishing any risks below these levels.  

National Grid takes the issue of health very seriously. We believe it is right that the decision on what is acceptable or not is made independently of industry. Accordingly, we design all our equipment, overhead infrastructure, cables, and substations to comply with the UK Health Security Agency’s recommended exposure guidelines. A vast amount of research has been done into the possibility of health effects, without establishing any risks below these levels. 

Further information is available in the booklet ‘EMFs; The Facts’ published by The Energy Networks Association (ENA) and on the dedicated National Grid EMFs website www.emfs.info. You can also contact National Grid’s EMF helpline on 0845 702 3270 or by email at [email protected].  

The safety of the public, local communities and our employees is central to everything that National Grid does. All our equipment is designed to comply with the Government Guidelines and policies for EMFs. There has been debate about the effects of EMFs, which are produced wherever electricity is used. Overhead infrastructure os one source of EMFs, but equally electrical appliances and cabling in our homes also produce EMFs and underground cables produce magnetic fields. National Grid fully recognises people’s concerns and takes this issue very seriously. We follow guidance given by the Government and authoritative independent scientific organisations, such as the World Health Organization (WHO) and The UK Health Security Agency (UKHSA), to ensure public safety and that our equipment complies with the appropriate independent safety standards. 

Household electrical equipment should not be affected by the proposal. National Grid’s equipment is designed to comply with the electromagnetic compatibility regulations (EMC Directive). Under normal operation high-voltage electricity equipment should not affect radio frequency equipment.  

In cases where it is reported that National Grid equipment is thought to be causing interference with other electrical equipment, National Grid will investigate and advise. In the unlikely event that National Grid equipment is demonstrated to be the cause of interference, remedial actions will be investigated.  

Electric and magnetic fields (EMFs) are produced wherever electricity is used, and there have been suggestions that exposure to these fields might be a cause of ill health. National Grid takes this issue very seriously and relies on authoritative and independent scientific organisations such as the World Health Organization (WHO) and UK Health Security Agency (formally Public Health England) to review the worldwide body of scientific evidence on EMFs and health as well as reviewing the science ourselves. We believe it is right that the decision on what is acceptable or not is made independently of National Grid.   

Health considerations are given a high priority in the process by which we arrive at any proposals for new electricity circuits. Assessment of compliance with national guidance and policies is key to our approach. The UK has a carefully thought-out set of policies for managing EMFs. These policies are incorporated into the decision-making process for Development Consent in National Policy Statement EN-5. Our approach is to ensure that all our assets comply with those policies, which are set by Government on the advice of their independent advisors the UK Health Security Agency (UKHSA). This will be fully documented and submitted as part of the consent application documentation.  

UK law does not prescribe any minimum distance between overhead infrastructure and homes. National Grid complies with guidelines set by the government regarding exposure to electric and magnetic fields.  

National Grid regards compliance with these as a key part of ensuring the health and safety of the public. Both fields diminish rapidly with distance from the source and National Grid are committed to openly documenting compliance with these guideline levels and submitted as part to the consent application to ensure that exposure levels at local properties are within the guideline levels.  

All our assets including all overhead equipment are designed to comply with the relevant exposure guidelines, which are adopted by the Government acting on the advice of the UK Health Security Agency. This is the principal way in which any risk from EMFs is managed.  

National Grid’s position on whether any action is appropriate to reduce exposures further is set out in our Public Position Statement:  

“We support the view of regulators and governments that the EMF issue warrants consideration for a precautionary approach and we look to them to decide on any measures that may be necessary, as they can evaluate the science and weigh up costs and benefits on behalf of society as a whole.  

To mitigate the amenity impact of new overhead transmission lines, we always endeavour to route them: 

• along formal Rights of Way in countries where they exist; or 

• away from existing buildings where they do not.  

To ensure safety clearances and to help us maintain our network, we do not encourage built development immediately beneath our lines. We will work with planning bodies to promote the sustainable use of land under our lines. These steps will usually result in EMF exposures being lower than would otherwise be the case.”  

A stakeholder group (SAGE) reviewed what precautionary measures should be adopted in light of the science at a national level and provided advice to Government.  UK Government has adopted the SAGE recommendation in respect of optimal phasing to reduce exposures from high-voltage power lines.  National Grid will ensure that all new overhead equipment comply with this precautionary policy. 

High-voltage underground cables produce magnetic fields in the same way that overhead infrastructure does, although the fields fall more quickly with distance as you move away from the cable. Directly above an underground cable there will often be a higher magnetic field than will be found under an equivalent overhead equipment.  

Irrespective of the technology used, National Grid will always ensure that all its equipment is designed to comply with any appropriate safety standards i.e. the exposure limits advised by and adopted by Government.  

Electric and magnetic fields (EMFs) are produced wherever electricity is used, and there have been suggestions that exposure to these fields might be a cause of ill health. National Grid fully recognises people’s concerns and the uncertain scientific position on this subject.  

National Grid takes this issue very seriously and relies on authoritative and independent scientific organisations such as the World Health Organisation (WHO) and in the UK Health Security Agency (UKHSA)to review the worldwide body of scientific evidence on EMFs and health rather than relying on its own assessment of the science. We believe it is right that the decision on what is acceptable or not is made independently of National Grid.  

Health considerations are given a high priority in the process by which we arrive at any proposals for new electricity circuits. Assessment of compliance with national guidance and policies is key to our approach. The UK has a carefully thought-out set of policies for managing EMFs, which includes both numerical exposure guidelines to protect against established, acute effects of EMFs, and precautionary policies to provide appropriate protection against the possibility of chronic effects of EMFs at lower levels, including, specifically, the possibility of a risk for childhood leukaemia. These policies are incorporated into the decision-making process for Development Consent in National Policy Statement EN-5.   

Our approach is to ensure that all our assets comply with those policies, which are set by Government on the advice of their independent advisors UKHSA. This ensures that health concerns are properly and adequately addressed. The evidence concerning compliance with these policies as specified in EN-5, including the numerical guidelines will be fully and publicly documented in National Grid DCO submission.   

National Grid operates an EMF information website and telephone helpline to answer any questions and concerns from members of the public. People requiring further information can look at the EMFs information website at www.emfs.info, or alternatively contact the EMF Helpline on 0845 702 3270 or via email – [email protected].  

National Grid is funded by a price control mechanism, which is agreed with and set by Ofgem. National Grid pays up front the many millions of pounds it costs to build a new power transmission line. The cost is then gradually passed to customers through their electricity bills over the next 40 years or so. The funding for these up-front costs comes from National Grid’s shareholders and the institutions that lend us money. Across all our investments in our vital infrastructure, this amounts to many billions of pounds. They invest in us because they expect that we will make a sufficient profit to provide an appropriate return on their investment and eventually pay them back. This brings a major benefit to electricity bill payers as it allows the recovery of the cost of our investment to be spread out over many years, rather than having a spike in electricity bills when we build a large new transmission connection.  

National Grid has an ongoing investment programme to modernise our high-voltage electricity transmission network and to connect new low-carbon generation, including nuclear and renewables. The new generation is vital to ensure as a nation we meet our carbon emissions targets and to ensure we all continue to benefit from secure and economic energy supplies. As a company we are investing around £1.3 billion per year in our UK electricity transmission system. Like many companies the funding for our investments comes from a number of sources including shareholders, reinvesting a significant proportion of our profits and borrowings against a secure income stream. Of course, shareholders expect a return on their investment, and we pay dividends out of our remaining profits.

National Grid charges both generators and supply companies for connection to and use of the transmission system. National Grid’s charging methodology is approved by Ofgem, the energy regulator. The cost of building a new connection is picked up by National Grid. During planning and construction of new transmission infrastructure, security for the cost is shared between the generating companies who will ultimately benefit from it. The money is recouped by National Grid over 40 years through charges made to generators and suppliers who use the line to transmit electricity. These charges pass through to consumers in their bills and are regulated by Ofgem. National Grid is currently investing around £1.3 billion a year in its electricity network. We need to raise that money up front from investors and lenders. Electricity consumers pay it back in their bills over some 40 years. Electricity transmission costs make up around 3.3% of the typical electricity bill.

Yes, building this new connection will have an impact on the price we all pay for electricity. That is why it is so important for us to strike the right balance between maintaining secure reliable electricity supplies, managing the cost to consumers, and minimising the impact on treasured landscapes.

When developing transmission network proposals, we have a statutory duty, under the Electricity Act 1989, to act in an efficient, coordinated and economical way, and have regard to the desirability of preserving amenity. When considering options to deliver additional electrical network capability, we must balance the need to develop the network in a way that is efficient, coordinated and economical, and minimises impacts on people and places.

In the UK, energy networks are regulated by Ofgem. Ofgem operates under the direction and governance of the Gas and Electricity Markets Authority (GEMA) and has established price control mechanisms that restrict the amount of revenue that can be earned by regulated businesses. National Grid is now operating under a five-year price control period (RIIO T2) which came into effect on 1 April 2021. RIIO stands for Revenue = Incentives + Innovation + Outputs. The RIIO model offers network companies real incentive for securing investment and driving innovation. This is to ensure the delivery of sustainable energy networks for current and future customers at the lowest cost. The regulator’s principal role is to protect the interests of existing and future consumers. The regulator must carry out its role in a way that promotes efficiency and economy, protects the public from danger, and secures a diverse long-term energy supply as well as taking into account environmental matters. Our shares are listed on the London Stock Exchange. As a consequence, we are also regulated by the Financial Services Authority in the UK.

Our Preliminary Corridor Route and Substation Siting Report explains the options that have been considered and why we feel that this option is the right one to take forward. We carefully consider all corridor options, taking into account factors such as visual impact, cost and technical complexity. We believe this option strikes the right balance between all of the factors we must consider, including affordability to electricity bill-payers and the impact of the new connection on the landscape. More information on the costs of the alternatives considered is available here.

Electricity transmission companies in the UK (National Grid, Scottish Power and Scottish Hydro Electric Transmission) need to invest significantly now and into the future to meet the energy challenges we all face, and to contribute towards achieving net zero – an immediate and notable example is to produce 50 GW of offshore wind energy by 2030, enough to power every home in the UK. Connecting new low carbon energy sources like offshore wind in East Anglia is part of that, but there are many other similar proposals elsewhere in the country. Ofgem and government are clear in setting the framework that we operate in, and they expect network companies to consider a wide array of factors when implementing new infrastructure, and to show that consumers are getting value for money. That applies as much to consumers here as it does elsewhere in the country. We are very mindful of the impact of our infrastructure, so we always consider ways to diminish this and listen to people’s views. We will consult with local authorities, environmental organisations, other bodies, and the public to identify concerns and mitigate any potential negative impacts.

National Grid Electricity Transmission – Breaking down your Bill