Technical visit
Explore the Power Behind London: Technical Visit to National Grid St John’s Wood Substation and London Power Tunnels.
Date: Friday, 6 March 2026
Location: St John’s Wood Substation, North Bank, London, NW8 8JY
Discover one of London’s largest transmission substations and go behind the scenes of the city’s energy network! St John’s Wood Substation is fully connected via underground cable circuits operating at 400,000 volts, offering a unique opportunity to see high-voltage electricity in action.
What to Expect:
- A guided tour of the state-of-the-art substation, led by National Grid experts.
- Optional access to the London Power Tunnels, a remarkable underground network 42 metres below street level (249 steps!), deeper than the London Underground, where cables carry power across the capital.
- Approximately two hours of immersive exploration, witnessing the scale and complexity of London’s electricity infrastructure.
Register your interest
Please note that we are required to pass all prospective visitors’ details to the venue, before attendance can be confirmed. Please register your interest to receive full registration details, including fees and availability.
Visitor Information:
- Visitors should wear robust footwear due to steps and uneven surfaces.
- Safety equipment (hard hat and hi-visibility vest) will be provided.
- Photography and videography are restricted, and all safety and security instructions must be strictly followed.
Don’t miss this rare opportunity to see the energy network that powers London like never before! Register your interest.
