Crossrail recycles disused Connaught Tunnel
A disused 600m tunnel in east London that was built in 1878 is being brought back to life for the Crossrail project.
The Connaught Tunnel was built to transport passengers and goods from the nearby docks and it became known as part of the North Woolwich Line.
It will cost Crossrail £50m to get the tunnel into a fit state so that tracks and an electricity supply can be put in.
However, they say this will be cheaper and better for the environment than creating another tunnel underneath.