National Grid Electricity Transmission (NGET) owns and maintains the electricity transmission network in England and Wales. We transport electricity from where it is generated, such as solar and offshore wind farms, to regional substations, where it then continues on its journey to homes and businesses. 

To ensure that everyone can access electricity from renewable sources, we are working to build a cleaner, fairer, and more affordable energy system that serves everyone, and powers the future of our homes, transport and industry. 

About Walpole Substation expansion 

The Walpole Substation expansion is required to accommodate new infrastructure at the existing substation. The work will be essential to connect new sources of renewable energy, manage power flows on the network and support future demand.  We will also be upgrading the existing technology, which was originally installed when the substation was built in the 1960s. 

Our proposals for Walpole Substation are part of The Great Grid Upgrade - the largest overhaul of the grid in generations. 

The Great Grid Upgrade will play a significant part in meeting the UK Government’s plans to power all homes and businesses with green energy by 2030 ensuring our electricity network is fit for the future. 

What we are proposing

The Walpole Substation expansion involves the construction of new infrastructure in and around the existing substation footprint. 

Walpole substation
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We have permitted development rights to deliver some of the work needed for this project, which is indicated by the blue boxes on the map.  

Other parts of the project will require planning permission – indicated by the yellow boxes on the map. This new infrastructure will facilitate new connections to our network, including renewable energy sources, and will support future demand. 

Biodiversity net gain 

We are committed to providing a minimum of 10% biodiversity net gain in areas where we work – this means there will be an improvement on the existing biodiversity in the area once we have finished our project.  

Surveys are underway to assess the expected level of vegetation removal including plans for additional landscaping and planting - this will form part of our planning application. 

Working with other projects 

Walpole Substation expansion is not part of EGL 3 and EGL 4 or Grimsby to Walpole. Please be assured we are working closely with our colleagues on these projects to minimise disruption to local communities. 


We are now consulting on our proposals to expand Walpole Substation. The deadline for providing feedback is 11:59pm Thursday 6 June 2024. 

Submit feedback

Taking part in our public consultation

Our consultation will run from Friday 10 May to Thursday 6 June 2024 (until 11:59pm) and will include a mix of online and in person activities. During this time, you will be able to consider our consultation materials and feedback on our plans. 

We are holding an in-person consultation event where information about our proposals will be on display and members of the project team will be available to answer your questions. There is no need to book, just turn up on the day.

Date: Monday 20 May 2024 

Time: 2pm - 7pm 

Location: Walpole Community Centre, Summer Close, Walpole St Andrew PE14 7JW 


We are also holding a consultation webinar, where we will present details on our proposals followed by an open question and answer session: 

Date: Wednesday 15 May 2024  

Time: 6:30pm – 7:30pm  

Register for webinar

Consultation materials

Consultation newsletter

Consultation banners

Contact us

Please contact us if you have any questions and if you would like to receive a printed copy of our consultation materials, including our feedback form, which can be returned to our Freepost address.

Email: [email protected]

Phone:0800 083 3149 (9am – 5pm Monday to Friday)

Freepost: WALPOLE SUBSTATION EXPANSION PROJECT (no stamp or further details required)




Walpole timeline

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Complete a feedback form 

You can share your feedback on our plans from Friday 10 May 2024. We encourage you to review our proposals and complete our feedback form.

This version is available to download from this website and you can return to us by post at Freepost WALPOLE SUBSTATION EXPANSION PROJECT (No stamp or further address details are required). Alternatively, please get in touch and we will post one to you. You will also be able to fill out a printed feedback form at our consultation event on Monday 20 May.

Our consultation is running until 11:59pm on Thursday 6 June 2024. We want to hear your views, so please submit your feedback by this date.

We will accept feedback forms sent via freepost if they are received by 11:59pm Thursday 6 June 2024. We cannot guarantee any feedback received after this time will be taken into consideration, so please submit your feedback by the deadline.