The project will complement the new Heathrow East Terminal and will be built in three phases. Scheme design was completed at the end of last year, with construction work commencing in the spring of 2008.
In the period 2008 to 2011, Phases 1 and 2 will be undertaken, comprising the Northern and Mid Sections. These phases of the project, worth approximately £350 million, will include a cut and cover tunnel which links Heathrow East with the Midfield Pier, passenger transfer travellators and cut and cover tunnels for a Track Transit System.
Commenting on the award today, Balfour Beatty chief executive, Ian Tyler, said:
"Having achieved preferred supplier status for BAA's programme of complex building works in the coming period, we are delighted to have secured the planned work on the Midfield Pier project at Heathrow.
"Our performance in delivering the rail systems element of Terminal 5 has been instrumental in the successful on-schedule handover of Terminal 5 to BAA on 17 September."