The joint venture beat rival shortlisted bidders Balfour Beatty Rail and a BAM Nuttal/Ferrovial Agroman/Kier Construction joint venture.
The deal adds to a strings of contract wins for Costain on Crossrail including tunnel portals, ventilation shafts and Bond Street and Paddington stations, Crossrail stated.

Andrew Wolstenholme, Crossrail chief executive, said: ³Tunnel fit-out is one of the largest contracts to be let by Crossrail and will create hundreds of new job opportunities as well as providing a welcome boost to regionally-based manufacturers and suppliers.²

Costain will be required to create around 50 new apprenticeships and new job start roles for Londoners who are long-term unemployed or out of education or training for six months or more during the life of their contract.