Crossrail construction workers stand near to one of the 1,000 tonne tunnel boring machines to mark the breakthrough into the Canary Wharf station
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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.