Pre-construction work planning and design is already under way on the three-phase project, part of the new Heathrow East Terminal.
Construction work is due to begin in the spring 2008, with the first two phases to build the northern and mid sections taking place over 2008 to 2011. Phases one and two, worth approximately £350m, will include a cut and cover tunnel to link Heathrow East with the Midfield Pier, passenger transfer travellators and cut and cover tunnels for a track transit system.
A remote passenger transfer stand may also form part of the first two phases of the project, which are due for completion in 2012, and would be worth an estimated further £78m. In Phase 3 a further southern section is due to be built at a value of around £100m.