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A first-of-its-kind electricity link between the UK and the Netherlands, and a vital...

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The Great Grid Upgrade

Braybrooke Network Rail Connection Project

We are building a new electricity substation near Braybrooke, on the outskirts of Market Harborough in Leicestershire.

Brinsworth to High Marnham Uprating

We propose an uprating of the existing 275kV overhead lines to facilitate a transmission load of 400kV and the development of three new substations to help carry more green power f...

Chesterfield to Willington

The Chesterfield to Willington project will reinforce the electricity transmission network and provide the necessary increased capacity between the North and the Midlands.

Weston Marsh to East Leicestershire

We are proposing roughly 60 km of new 400 kV overhead line which would run east to west from the infrastructure at Weston Marsh substation(s)

Bramford to Twinstead

We need to strengthen the network here to increase the network capability in the region to carry the clean green energy that is proposed in East Anglia.

Bicker Fen – transformer installation for a new customer connection

Over the next few years we’ll invest in new equipment at Bicker Fen substation.

Cottam to Wymondley Overhead line refurbishment

Over the next 2 years, we will be completing some essential refurbishment work to ensure that the line continues to provide a safe and reliable supply of electricity to homes and b...

Navemby Substation

National Grid Electricity Transmission is currently investigating suitable sites close to Navenby in Lincolnshire for a proposed new substation to connect to several proposed solar...

Norwich to Tilbury

The Norwich to Tilbury project is a proposal to build a new high voltage network reinforcement between Norwich, Bramford and Tilbury.

Sea Link

National Grid Electricity Transmission is currently developing proposals for Sea Link, a new planned high voltage undersea electricity link between Suffolk and Kent.

London Power Tunnels

In Spring 2020 we embarked upon a seven-year, £1 billion project, to rewire South London via deep underground tunnels. This vital work will help keep Londoners connected to safe an...

North London Reinforcement Project

The North London Reinforcement project will see work being conducted on the existing overhead line between Pelham and Rye House substation and Hackney substation.

Eastern Green Link 1

EGL1 is a two gigawatt (GW) high voltage direct current (HVDC) electrical superhighway to be built between the Torness area in East Lothian, Scotland and Hawthorn Pit in County Dur...

Eastern Green Link 3 and Eastern Green Link 4

The Eastern Green Link 3 (EGL3) and Eastern Green Link 4 (EGL4) projects are needed to increase network capability to connect the numerous new offshore wind farms that are being de...

Grimsby to Walpole

The Grimsby to Walpole upgrade is a proposal to build a new high voltage overhead line in Lincolnshire, including building new pylons and new substations. It is needed to increase...

North Humber to High Marnham

We are proposing to build a new high voltage electricity transmission line and associated works between a new substation north of Hull at Creyke Beck in the East Riding of Yorkshir...

South Shields Substation

This work will include the erection of two new compounds on land already owned by National Grid for the installation of this equipment, and for some other associated works includin...

Tyne Crossing Strategic Replacement

National Grid is working with the North East Combined Authority (NECA), Port of Tyne and regional partners to remove the restriction posed by existing overhead electricity lines that cross the River Tyne at Wallsend and Jarrow.

Carlisle to Newcastle

Carlisle to Newcastle is a proposal in its early stages of development to upgrade the electricity network between the North West and North East of England.

Cross Border Connection

This project is designed to strengthen the electricity network between Scotland and England. It will connect new sources of energy in the Scottish Borders to the wider network.

Kearsley to Whitegate

We are carrying out refurbishment work on our electricity transmission line that runs between our substations in Kearsley and Whitegate. This line is 15km long and has 45 pylons.

Penwortham to Daines

We are carrying out refurbishment work on our electricity transmission line that runs between our substations in Penwortham near Preston and Daines to the West of Manchester. This...

Essex overhead line

Over the coming months, we will be replacing the remainder of the overhead line, conductors, and fittings on the Bramford to Braintree to Rayleigh route.

Fleet to Lovedean Overhead Line

The overhead lines running between Fleet and Lovedean have been operational for many years and National Grid has identified the route as needing refurbishment.

Grain to Tilbury

The Grain to Tilbury project is a proposed electricity infrastructure upgrade, involving the replacement of the existing 1960s Thames Cable Tunnel beneath the Thames between Tilbur...

Littlebrook to Kemsley Overhead Line

In recent years we’ve been refurbishing part of our overhead line network in Kent County.

Littlebrook substation

The current substation at Littlebrook, Dartford is no longer fit for purpose and a new facility is needed to ensure that we continue to provide a reliable supply of electricity for...

Little Horsted – new substation

Establishing a new grid supply point near Little Horsted, connected to UK Power Networks’ Lewes substation via new underground electricity cables.

Richborough Connection

The Richborough Connection will connect the high-voltage electricity link between Belgium and Richborough near Sandwich to the National Grid.

Bramley Network Rail Connection

To support Network Rail in the decarbonisation of its network, we are installing a 400/25kV Supergrid transformer at Bramley substation and connecting it to a new trackside substat...

Cotswold (Visual Impact Provision)

A stunning landscape crossed by the popular Cotswold Way National Trail, with expansive views across farmland, ancient woodland and distinctive escarpments.

Dorset (Visual Impact Provision)

The geology is strongly expressed along the Jurassic Coast, a World Heritage Site, and gives rise to a varied landscape of downland, ridges and vales.

Hinkley Connection Project

In the South West, EDF Energy has been granted a Development Consent Order for a new nuclear power station at Hinkley Point.

IFA2 Connection

Constructing an electricity substation to connect the new IFA2 interconnector to the national electricity network.

Landscape Enhancement Initiative (LEI)

The Landscape Enhancement Initiative (LEI) is an important part of the VIP project. Championed by our stakeholders, the initiative aims to use up to £11m of the Ofgem provision for...

Mannington to Nursling Overhead Line

From October 2022, National Grid will be working in partnership with its contractor Balfour Beatty to refurbish a 40km/25 mile stretch of overhead power line between Nursling and M...

North Wessex Downs (Visual Impact Provision)

A predominantly chalkland landscape with dramatic scarp slopes and moulded dip slopes that reflect the area’s underlying chalk geology.

Eryri (Visual Impact Provision)

A dramatic and varied landscape which includes spectacular mountain scenery, glacial valleys, extensive moorlands and two dramatic coastal estuaries.

Dinorwig to Pentir / O Ddinorwig i Bentir

National Grid needs to replace the existing underground cables between Dinorwig power station and our substation at Pentir.

Pembroke substation extension/ Estyniad Is-orsaf Penfro

Pembroke substation site extension to help meet the growing demand for electricity in the area.

Penrhos Substation / Is-orsaf Penrhos

Construction of a new Gas Insulated Substation (GIS) and associated cable replacement.

Pentir to Trawsfynydd reinforcement / Atgyfnerthu’r cysylltiad rhwng Pentir a Thrawsfynydd

National Grid needs to reinforce and refurbish parts of the existing high voltage power network in North Wales.

Swansea to Pembroke / Abertawe i Phenfro

We’ll shortly be refurbishing the overhead power lines between Swansea and Pembroke.

Walham to Cilfynydd / Walham i Cilfynydd

We’ll shortly be refurbishing the overhead power lines between Walham and Cilfynydd / Cyn bo hir, byddwn yn adnewyddu'r llinellau pŵer uwchben rhwng Walham a Cilfynydd.

Coleshill to Bedworth

We’ll carry out further upgrade and maintenance work to fully refurbish the 50-year-old line. This concludes the activity we started in 2017. This will keep the transmission networ...

Drax to Thornton Overhead Line

Our overhead line running between Drax and Thornton, in Yorkshire, has been operational since 1971. To ensure it remains reliable and keeps homes and businesses in the region suppl...

Eastern Green Link 2

EGL2 is a 2GW high voltage direct current (HVDC) electrical ‘superhighway’ cable link to be built between Peterhead in Aberdeenshire, Scotland and Drax in North Yorkshire, England.

Middleton Substation

National Grid Electricity Transmission is preparing to submit a planning application for an extension to Middleton Substation, near Heysham.

Sheffield Cable Replacement

National Grid is proposing to replace three existing underground cable routes between Pitsmoor, Wincobank and Templeborough substations in Sheffield.

West Yorkshire Overhead Line

In recent years we’ve been refurbishing part of our overhead line network in West Yorkshire.

Yorkshire Green

The Yorkshire GREEN project proposes new infrastructure including substations, overhead lines, underground cables and cable sealing end compounds (where underground cables meet ove...

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Ofgem's RIIO-T3 Final Determination

Our response to Ofgem's Final Determination for the RIIO-T3 framework for the period April 2026 to March 2031.

Read more

National Grid Ventures to invest $1.75bn to accelerate power solutions for U.S. data centers and AI

National Grid Ventures (NGV), the commercial arm of National Grid plc, has agreed to invest...

Read more

National Grid joins Northern Powerhouse Partnership

The partnership will support investment, skills, jobs and supply chain growth across...

Read more

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  - The Great Grid Upgrade
    
    The Great Grid Upgrade
  - East Midlands
    
    Braybrooke Network Rail Connection Project
    
    We are building a new electricity substation near Braybrooke, on the outskirts of Market Harborough in Leicestershire.
    
    Brinsworth to High Marnham Uprating
    
    We propose an uprating of the existing 275kV overhead lines to facilitate a transmission load of 400kV and the development of three new substations to help carry more green power f...
    
    Chesterfield to Willington
    
    The Chesterfield to Willington project will reinforce the electricity transmission network and provide the necessary increased capacity between the North and the Midlands.
    
    Weston Marsh to East Leicestershire
    
    We are proposing roughly 60 km of new 400 kV overhead line which would run east to west from the infrastructure at Weston Marsh substation(s)
    
    East Midlands
  - East of England
    
    Bramford to Twinstead
    
    We need to strengthen the network here to increase the network capability in the region to carry the clean green energy that is proposed in East Anglia.
    
    Bicker Fen – transformer installation for a new customer connection
    
    Over the next few years we’ll invest in new equipment at Bicker Fen substation.
    
    Cottam to Wymondley Overhead line refurbishment
    
    Over the next 2 years, we will be completing some essential refurbishment work to ensure that the line continues to provide a safe and reliable supply of electricity to homes and b...
    
    Navemby Substation
    
    National Grid Electricity Transmission is currently investigating suitable sites close to Navenby in Lincolnshire for a proposed new substation to connect to several proposed solar...
    
    Norwich to Tilbury
    
    The Norwich to Tilbury project is a proposal to build a new high voltage network reinforcement between Norwich, Bramford and Tilbury.
    
    Sea Link
    
    National Grid Electricity Transmission is currently developing proposals for Sea Link, a new planned high voltage undersea electricity link between Suffolk and Kent.
    
    East of England
  - London
    
    London Power Tunnels
    
    In Spring 2020 we embarked upon a seven-year, £1 billion project, to rewire South London via deep underground tunnels. This vital work will help keep Londoners connected to safe an...
    
    North London Reinforcement Project
    
    The North London Reinforcement project will see work being conducted on the existing overhead line between Pelham and Rye House substation and Hackney substation.
    
    London
  - North East
    
    Eastern Green Link 1
    
    EGL1 is a two gigawatt (GW) high voltage direct current (HVDC) electrical superhighway to be built between the Torness area in East Lothian, Scotland and Hawthorn Pit in County Dur...
    
    Eastern Green Link 3 and Eastern Green Link 4
    
    The Eastern Green Link 3 (EGL3) and Eastern Green Link 4 (EGL4) projects are needed to increase network capability to connect the numerous new offshore wind farms that are being de...
    
    Grimsby to Walpole
    
    The Grimsby to Walpole upgrade is a proposal to build a new high voltage overhead line in Lincolnshire, including building new pylons and new substations. It is needed to increase...
    
    North Humber to High Marnham
    
    We are proposing to build a new high voltage electricity transmission line and associated works between a new substation north of Hull at Creyke Beck in the East Riding of Yorkshir...
    
    South Shields Substation
    
    This work will include the erection of two new compounds on land already owned by National Grid for the installation of this equipment, and for some other associated works includin...
    
    Tyne Crossing Strategic Replacement
    
    National Grid is working with the North East Combined Authority (NECA), Port of Tyne and regional partners to remove the restriction posed by existing overhead electricity lines that cross the River Tyne at Wallsend and Jarrow.
    
    North East
  - North West
    
    Carlisle to Newcastle
    
    Carlisle to Newcastle is a proposal in its early stages of development to upgrade the electricity network between the North West and North East of England.
    
    Cross Border Connection
    
    This project is designed to strengthen the electricity network between Scotland and England. It will connect new sources of energy in the Scottish Borders to the wider network.
    
    Kearsley to Whitegate
    
    We are carrying out refurbishment work on our electricity transmission line that runs between our substations in Kearsley and Whitegate. This line is 15km long and has 45 pylons.
    
    Penwortham to Daines
    
    We are carrying out refurbishment work on our electricity transmission line that runs between our substations in Penwortham near Preston and Daines to the West of Manchester. This...
    
    North West
  - South East
    
    Essex overhead line
    
    Over the coming months, we will be replacing the remainder of the overhead line, conductors, and fittings on the Bramford to Braintree to Rayleigh route.
    
    Fleet to Lovedean Overhead Line
    
    The overhead lines running between Fleet and Lovedean have been operational for many years and National Grid has identified the route as needing refurbishment.
    
    Grain to Tilbury
    
    The Grain to Tilbury project is a proposed electricity infrastructure upgrade, involving the replacement of the existing 1960s Thames Cable Tunnel beneath the Thames between Tilbur...
    
    Littlebrook to Kemsley Overhead Line
    
    In recent years we’ve been refurbishing part of our overhead line network in Kent County.
    
    Littlebrook substation
    
    The current substation at Littlebrook, Dartford is no longer fit for purpose and a new facility is needed to ensure that we continue to provide a reliable supply of electricity for...
    
    Little Horsted – new substation
    
    Establishing a new grid supply point near Little Horsted, connected to UK Power Networks’ Lewes substation via new underground electricity cables.
    
    Richborough Connection
    
    The Richborough Connection will connect the high-voltage electricity link between Belgium and Richborough near Sandwich to the National Grid.
    
    South East
  - South West
    
    Bramley Network Rail Connection
    
    To support Network Rail in the decarbonisation of its network, we are installing a 400/25kV Supergrid transformer at Bramley substation and connecting it to a new trackside substat...
    
    Cotswold (Visual Impact Provision)
    
    A stunning landscape crossed by the popular Cotswold Way National Trail, with expansive views across farmland, ancient woodland and distinctive escarpments.
    
    Dorset (Visual Impact Provision)
    
    The geology is strongly expressed along the Jurassic Coast, a World Heritage Site, and gives rise to a varied landscape of downland, ridges and vales.
    
    Hinkley Connection Project
    
    In the South West, EDF Energy has been granted a Development Consent Order for a new nuclear power station at Hinkley Point.
    
    IFA2 Connection
    
    Constructing an electricity substation to connect the new IFA2 interconnector to the national electricity network.
    
    Landscape Enhancement Initiative (LEI)
    
    The Landscape Enhancement Initiative (LEI) is an important part of the VIP project. Championed by our stakeholders, the initiative aims to use up to £11m of the Ofgem provision for...
    
    Mannington to Nursling Overhead Line
    
    From October 2022, National Grid will be working in partnership with its contractor Balfour Beatty to refurbish a 40km/25 mile stretch of overhead power line between Nursling and M...
    
    North Wessex Downs (Visual Impact Provision)
    
    A predominantly chalkland landscape with dramatic scarp slopes and moulded dip slopes that reflect the area’s underlying chalk geology.
    
    South West
  - Wales / Cmyru
    
    Eryri (Visual Impact Provision)
    
    A dramatic and varied landscape which includes spectacular mountain scenery, glacial valleys, extensive moorlands and two dramatic coastal estuaries.
    
    Dinorwig to Pentir / O Ddinorwig i Bentir
    
    National Grid needs to replace the existing underground cables between Dinorwig power station and our substation at Pentir.
    
    Pembroke substation extension/ Estyniad Is-orsaf Penfro
    
    Pembroke substation site extension to help meet the growing demand for electricity in the area.
    
    Penrhos Substation / Is-orsaf Penrhos
    
    Construction of a new Gas Insulated Substation (GIS) and associated cable replacement.
    
    Pentir to Trawsfynydd reinforcement / Atgyfnerthu’r cysylltiad rhwng Pentir a Thrawsfynydd
    
    National Grid needs to reinforce and refurbish parts of the existing high voltage power network in North Wales.
    
    Swansea to Pembroke / Abertawe i Phenfro
    
    We’ll shortly be refurbishing the overhead power lines between Swansea and Pembroke.
    
    Walham to Cilfynydd / Walham i Cilfynydd
    
    We’ll shortly be refurbishing the overhead power lines between Walham and Cilfynydd / Cyn bo hir, byddwn yn adnewyddu'r llinellau pŵer uwchben rhwng Walham a Cilfynydd.
    
    Wales / Cmyru
  - West Midlands
    
    Coleshill to Bedworth
    
    We’ll carry out further upgrade and maintenance work to fully refurbish the 50-year-old line. This concludes the activity we started in 2017. This will keep the transmission networ...
    
    West Midlands
  - Yorkshire & the Humber
    
    Drax to Thornton Overhead Line
    
    Our overhead line running between Drax and Thornton, in Yorkshire, has been operational since 1971. To ensure it remains reliable and keeps homes and businesses in the region suppl...
    
    Eastern Green Link 2
    
    EGL2 is a 2GW high voltage direct current (HVDC) electrical ‘superhighway’ cable link to be built between Peterhead in Aberdeenshire, Scotland and Drax in North Yorkshire, England.
    
    Middleton Substation
    
    National Grid Electricity Transmission is preparing to submit a planning application for an extension to Middleton Substation, near Heysham.
    
    Sheffield Cable Replacement
    
    National Grid is proposing to replace three existing underground cable routes between Pitsmoor, Wincobank and Templeborough substations in Sheffield.
    
    West Yorkshire Overhead Line
    
    In recent years we’ve been refurbishing part of our overhead line network in West Yorkshire.
    
    Yorkshire Green
    
    The Yorkshire GREEN project proposes new infrastructure including substations, overhead lines, underground cables and cable sealing end compounds (where underground cables meet ove...
    
    Yorkshire & the Humber
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See our Full Year Results 2025/26

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Power cut? Call 105

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National Grid Ventures to invest $1.75bn to accelerate power solutions for U.S. data centers and AI

National Grid Ventures (NGV), the commercial arm of National Grid plc, has agreed to invest $1.75 billion for a 35% stake in Joulent LLC.

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National Grid Launches AI-Powered Wildfire Risk

2,500 Thanksgiving Meal Boxes for Long Island families

We've partnered with Feeding NY, a program sponsored by the United Nations Global Youth & Excellence Leadership Program.

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National Grid Ventures to invest $1.75bn to accelerate power solutions for U.S. data centers and AI

National Grid Ventures (NGV), the commercial arm of National Grid plc, has agreed to invest $1.75 billion for a 35% stake in Joulent LLC.

Read more

Energy Affordability Assistance in Massachusetts

Funds to provide resources to help Massachusetts seniors and income-eligible households manage energy costs

Read more

National Grid Launches AI-Powered Wildfire Risk Initiative with Rhizome

As wildfire risk increases across the Northeast, we're taking action to improve resilience for customers and communities

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Annual Report and Accounts

National Grid plc Annual Report and Accounts 2025/26

View the report

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History of energy in the UK

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Grid for good

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Responsible business reporting centre

Putting our energy where it matters

Our responsibility to communities goes beyond delivering energy

Grid for Good

The history of National Grid

A responsible business

Take a journey behind the grid…

Go behind the scenes of the UK’s electricity system to discover how it all works

See more

Are you looking for...

About our company

Our responsibility

Our history

Explore opportunities

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UK gender pay gap

Green collar jobs

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Are you looking for...

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AGM and GM

Dividends

Go paperless and chequeless dividends

Managing your shareholding

FAQ's

Shareholder security

Shareholder privacy notice

Share price & returns centre

Shareholder contacts

Find out how to get in touch

See contacts

Investor FAQs

Find answers to frequently-asked questions

See FAQS

Managing your shareholding

Information about managing your National Grid plc shares or National Grid ADRs

Find out more

General meetings

Find details and download documents relating to our GMs and AGMs

Find out more

News

Are you looking for...

Event calendar

Results centre

All National Grid news

Company announcements (RNS Feed)

RIIO-T3

RIIO-2

Acquisition of WPD and strategic repositioning

Email alerts

Company announcements

All regulatory announcements made by National Grid plc to the London Stock Exchange

See announcements

Our RIIO-T3 business plan

Our business plan for RIIO-T3 sets out an ambitious framework to deliver up to £35bn investment.

Find out more

Receive our email alerts

Sign up to get our latest news sent straight to your inbox

Sign up

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Investor Event 2025

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Investor Event 2025

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Grid Guide to

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See all of our our upcoming investor events

See our events

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Download materials from our latest results announcement

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Download materials from our latest IR events and company announcements

Find out more

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Analyst modelling

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Events and materials

Download materials from our latest IR events and company announcements

Find out more

Annual Reports and Accounts

Find annual reports and accounts for National Grid plc, UK subsidiaries and US subsidiaries

See reports

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Find all of our factsheets for investors

See factsheets

Debt investors

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Our Group structure

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View our list of individual bonds

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Debt information

Debt investor relations is managed by Treasury’s Debt Capital Markets team

Find out more

Green financing

Our Green Financing report covers the allocation of our green bonds' proceeds and their environmental impact.

Find out more

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Experiencing a power outage?

Experiencing a power outage?

Smell gas? Act fast

What to do if you smell gas
Contact us

Report an outage

Report a gas emergency

Explore National Grid
Explore National Grid
See our Full Year Results 2025/26

Discover our latest news

Be part of the energy future

Browse our career opportunities and training programmes

Discover your new career
Energy customers
Energy customers
Sign in to your account

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Tell us you're moving
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Investors
See our Full Year Results 2025/26

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Contact us
Contact us
Experiencing a power outage?

Experiencing a power outage?

Smell gas? Act fast

What to do if you smell gas

19 Apr 2017: Blackpool: essential upgrade of gas pipe

File

blackpool essential upgrade of gas pipe__19Apr2017 .pdf

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