Construction on the second phase of National Grid’s London Power Tunnels megaproject will start in summer next year, it has been announced.
The 30km-long tunnel will run from Wimbledon in south-west London to Crayford in south-east London.
The first phase of the power tunnels project – a £1bn, 32km long tunnel running from Hackney in east London to Willesden to the west of the capital, and from Kensal Green in the north-west to Wimbledon in the south – was completed in February this year. Two new substations were also built as part of the scheme.
The second phase is now needed to replace three existing electricity circuits that are coming to the end of their life. The circuits will be replaced in stages, with the Hurst-to-Crayford section operational by 2024; New Cross to Wimbledon by 2025; and Hurst to New Cross by 2027.
The phase is expected to take eight years to complete.
The majority of the construction will take place under permitted development rights, meaning no planning permission will be needed for the project as a whole. However, permission will need to be granted to build the head houses covering the tunnels’ shafts.
National Grid said an application for planning permission for the head houses at Kings Avenue, Kidbrooke and Eltham would be submitted to the respective London boroughs in summer 2018.
Public information events are now being held to inform residents of the proposals.