Crossrail tunnel breaks through into Canary Wharf station
31 May 2013 Last updated at 22:53 BST
The Crossrail project has reached its biggest milestone so far - one of its tunnelling machines has broken through into the station at Canary Wharf.
Europe's biggest infrastructure project is now more than one-third complete.
The 73-mile long Crossrail will link Maidenhead with east London and due to be completed in 2018.
Elaine Thelen reports.
Pictures courtesy of Crossrail.