"Construction drills burst through train tunnel wall near Old Street"
|Link to Hackney Gazette|
"First Capital Connect (FCC) cancelled all Northern City Line services between Finsbury Park and Moorgate from 10am on Friday, after the incident which happened just north of Old Street station.
"The alarm was initially raised after the driver of the Welwyn Garden City to Moorgate service with passengers on board saw muddy water pouring on to the roof of his train, and services were suspended.
"A second empty train was sent along the line just after 11am to investigate the problem but as it approached the area at low speed, two large piling drills came through the side of the tunnel."