The £1.2bn Northern line extension to Battersea celebrated the completion of its tunnelling work in November 2017. The Tunnel Boring Machine (or TBM), dubbed 'Amy' by local school children, broke through the final wall at Kennington and we were there to watch her work her magic.
Want to go behind the scenes of the Northern line extension? Of course you do. Here's our video from within the tunnels.
