Crossrail tunnel breaks through into Canary Wharf station

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.