The way we generate electricity in the UK is changing rapidly, and we are transitioning to cleaner technologies like new offshore wind farms. That means we need to make significant changes to the grid so the whole country has access to and can benefit from the clean electricity from these new renewable sources.

The UK is committed to being a global leader in clean energy. The Government has set a legally-binding commitment to reach net zero greenhouse gas emissions by 2050 and an ambition to connect 50 gigawatts (GW) of offshore wind by 2030 – enough energy to power every home in the country.

To achieve this, offshore wind is being developed at an unprecedented scale off the East Coast of England and in Scotland and around 60% of the current offshore wind projects will come ashore along the East Coast of the country.

In a rapidly changing world, having more locally produced renewable energy connected to the grid will enhance Britain’s energy security, help reduce energy costs for consumers, combat climate change and create new jobs in the energy sector.

Couple this with greater interconnection with countries across the North Sea – enabling trading of electricity by countries via undersea electrical connections – we expect to see a significant increase in the level of renewables and low carbon energy connecting on the East Coast.

While our existing high-voltage electricity network has been sufficient until today, it doesn’t have the capability needed to reliably and securely transport all the energy that will be connected by 2030.

Project overview

EGL 3 and EGL 4 are needed as the existing transmission network does not have enough capacity to securely and reliably transport the increasing amount of energy generated in Scotland and Scottish waters, particularly from offshore wind, to where it is needed in England.

These proposals form part of ‘The Great Grid Upgrade’, which is the largest overhaul of the grid in generations. It will help the UK switch to clean energy, connecting wind power from the North Sea straight to the things you love and value.

The EGL 3 project will be a new primarily offshore High Voltage Direct Current (HVDC) electrical link from Peterhead, Aberdeenshire, to the south Lincolnshire/West Norfolk area.

EGL 4 will be a new primarily offshore HVDC electrical link from east Scotland, also to the south Lincolnshire/West Norfolk area.

Where offshore projects such as these connect with the land, we also have to build onshore infrastructure to enable the clean energy to be transported to homes and businesses. The onshore infrastructure required for each of these projects will include new converter stations and substations, as well as underground cables to connect everything together.

The Great Grid Upgrade

The Great Grid Upgrade is the largest overhaul of the electricity grid in generations. Our infrastructure projects across England and Wales are helping to connect more renewable energy to your homes and businesses.

Find out more

Offshore elements of EGL 3 and EGL 4

Consent for the offshore elements of EGL 3 and EGL 4 will be sought via separate marine licence applications for development in English and Scottish waters respectively.  

The Marine Management Organisation (MMO), who are the offshore consenting body for the works in English waters, has confirmed that the marine proposals for EGL 3 and EGL 4 are non-Environmental Impact Assessment (EIA) projects, however a Marine Environmental Appraisal will be submitted as part of the marine licence application.

This work is separate to the onshore proposals in this consultation, with a separate National Grid team already undertaking engagement with a number of statutory marine stakeholders, including Natural England, Historic England, fisheries groups, port authorities and the Environment Agency.

The Marine Directorate Licensing Operations Team (MD-LOT) will be handling the marine licence application for the offshore elements of EGL 3 and EGL 4  in Scottish waters.

Next steps

Consultation plays an important part in developing our projects. We will be sharing our early proposals in our first stage public consultation, which will run from Tuesday 23 April 2024 to Monday 17 June 2024. During this time, we will be seeking feedback from the community and local stakeholders. 

The feedback received will enable us to further develop our plans before holding an additional public consultation in 2025 on our more detailed proposals.

We will let local communities and stakeholders know about our first stage public consultation in advance. In the meantime, you can register for updates by submitting your email address in the box above.

Please check back here for further updates or contact us by emailing [email protected] or calling 0800 298 0405.

General information

Who is National Grid?

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.

We are working to build a cleaner, fairer, and more affordable energy system that serves everyone – powering the future of our homes, transport, and industry. We believe by acting now, the UK can become the world’s first major clean economy, creating growth and jobs for communities across Britain.

National Grid is a group of companies, and one of those companies, National Grid Electricity Transmission (NGET), owns, builds and maintains the network in England and Wales. It is NGET that is developing plans for the Grimsby to Walpole upgrade.

Within the National Grid Group there are other distinctly separate legal entities, each with their individual responsibilities and roles. More information about National Grid can be found on the about us section of National Grid’s website.

What is National Grid Electricity Transmission (NGET)?

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

It is NGET that is developing plans for the Grimsby to Walpole reinforcement and is the electricity transmission arm within National Grid.

What is The Great Grid Upgrade?

The Great Grid Upgrade is the largest overhaul of the grid in generations – making sure that renewable energy can move from where it’s generated to where it’s needed, enabling us all to power the things we love with cleaner energy.

Where can I find out more information about The Great Grid Upgrade?

You can visit for more information.