Site update

The Wimbledon site team have working hours of 8am-6pm on weekdays and 8am-1pm on Saturdays. Access to the site will be through Copper Mill Lane.

Further to this, improvement works will be taking place on Riverside Road, as part of National Grid UK Land and Property works. However, these should not have an impact on the works for the London Power Tunnels project.

Works at our Wimbledon substation site will involve using the existing headhouse building and tunnel access shaft, which were built as part of London Power Tunnels phase 1 and preparing it to receive a tunnel boring machine from King’s Avenue, Brixton.

Our works will be carried out under our permitted development rights and have been agreed with the London Borough of Wandsworth.



  • We started works at Wimbledon Substation in May 2022.

  • In Summer 2022 works to the existing headhouse building were carried out, including the removal of the roof.

  • The tunnel boring machine arrived from Kings Avenue in July 2022.

  • Tunnel repair works and cable bracket installation is currently underway, with final fittings to the tunnel to be made in Q1 of 2023.

  • The site will be occupied until September 2025.

Site specific FAQs

Where is the Wimbledon Substation site?

Our substation in Wimbledon is located next to Wimbledon Football Club, the River Wandle and Garratt Business Park, in the London Borough of Wandsworth.


Access to the headhouse and shaft will be through the substation via Copper Mill Lane. Riverside Road will be used as a second access option only.


Vehicle movements will be limited to light vehicles, vans and flatbed lorries. No large numbers of HGV movements are expected.

Working hours

Site working hours will be 7am to 5pm Monday to Friday, and 8am to 1pm on Saturdays. No work on Sundays or Bank Holidays is expected.


Field worker inside london power tunnels

Contact us

If you would like to discuss the project in greater detail or have any questions, please contact our community relations team using the details below:

Call our Freephone helpline number: 0800 783 2855 (lines open 9am to 5pm, Monday to Friday)

Email: [email protected]