London Power Tunnel

London Power Tunnels Phase 1

In February 2011 National Grid embarked on a £1 billion project over a seven year period to rewire London via deep underground tunnels in order to meet increasing electricity demand and help London access the energy of the future.

In total, 32km of tunnels with diameters of 3m and 4m were constructed between 20 to 60m deep below the road network and 14 shafts sunk at sites along the route. A power connection is provided for Crossrail together with the construction of two new substations and works to extend four further substations.

Throughout Phase 1 192km of high voltage cable circuits were installed, tested and commissioned. The seven year project completed at the end of 2017.

Utility Project of the Year Winner - British Construction Industry Awards 2018


National Grid Electricity Transmission PLC



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