The deal will be the last significant works contract for the Crossrail project, although London Underground is the awarding client for the project.

It ranks as the eighth contract win on the Crossrail project for the duo, which are now looking for a repeat performance on the first phase of HS2 where they will also jointly bid.

On the Paddington passenger tunnel the Enquirer understands the two have fended off rival bids from Dragados, and Morgan Sindall’s joint venture with BeMo Tunnelling

The 100m long tunnel will link the new Crossrail station to the London Underground Bakerloo Line station at Paddington.

It is essential to support the increase in passengers when Crossrail starts serving the station at the end of 2018.

Initially a shallow pedestrian walkway was planned but this carried the risk of damaging thegrade I Listed Brunel Shed above the station.

An alternative, deeper level design for the link is now planned, which falls outside of the original powers of the Crossrail Act.

The preferred construction option is to excavate a temporary construction shaft at the junction of London Street and Winsland Mews.