Tunelling starts on the Northern Line Extension – IanVisits – London News and Events Guide

Tunelling starts on the Northern Line Extension – IanVisits – London News and Events Guide
... The Northern Line Extension has taken a step forward as the first of two giant tunnel boring machines, Helen, began her 3.2km tunnelling journey to extend the line from Kennington to Battersea. ... Helen has now set off under south London to create the first of the underground tunnels that will extend the Charing Cross branch of the Northern line from Kennington to Battersea Power Station, via Nine Elms. ...