Crossrail’s western tunnels contractor BFK is making use of the tram tunnel underneath Kingsway that once took passengers from Holborn to Waterloo Bridge, to build an 8m deep, 5m wide, grout shaft below the floor of the tunnel. This will protect nearby buildings from any potential ground movement when Crossrail’s TBMs reach the area in 2013.

"The Kingsway Tram Tunnel has played a fascinating and unique role in London’s transport history," said Keith Sibley, crossrail area director. "Now it will play a vital part in helping prepare the ground for the city’s most ambitious transport project to date. As the tunnel is a Grade II listed structure, Crossrail will return the Camden section of the tram tunnel to its prior condition when the works are completed."