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Final breakthrough deep below London means Crossrail tunnelling is finally complete

History was made beneath the streets of London today when Europe's largest construction project reached a crucial milestone.

Credit: PA

Three years of tunnelling work to create the new Crossail underground railway came to an end at Farringdon.

Credit: PA

The final breakthrough in the tunnel boring was witnessed by Transport Secretary Patrick McLoughlin and London mayor Boris Johnson.

Credit: PA

Crossrail, which opens in 2018, will link Reading in Berkshire with Shenfield in Essex and Abbey Wood in Kent.

Credit: PA

The high speed commuter line will allow direct trains between Heathrow Airport, Canary Wharf and the City, travelling along 26 miles of tunnels.

Credit: PA

Boring work began at Royal Oak near Paddington in May 2012.

Millions of tonnes of excavated London clay has been shipped to Wallasea Island in Essex to create a nature reserve for birds.