After three years of literally earth-moving work, tunneling for London's largest ever infrastructure project has finally finished - with a ceremony for the final "break through" under Farringdon station.
David Cameron and Boris Johnson were there for the break through on the railway, which will run east to west through London when it opens in 2018, adding 10 per cent capacity to London's rail network.
The line will include 40 new stations, stretching between Reading and Heathrow to Shenfield and Abbey Wood. At its centre, Farringdon will become one of the UK's busiest rail hubs.
Boris called the break through a "landmark event", adding:
"[It] puts us a gigantic step closer to the launch of an absolutely vital new railway, which will hugely improve our ability to speedily move people across our city.
"It is a wonderful example of our nation’s talent for engineering, a talent that must not be allowed to founder and that I hope will eventually be put to use on the construction of Crossrail 2.”