Crossrail has started the search for a contractor to build one of the most complex stations on the £14.5bn project.
The £350M Farringdon station project will see the successful contractor construct two platform tunnels, each 245m long, between new ticket halls to the east and west.
At the western end, the ticket hall is combined with a proposed ticket hall for the Thameslink project, which is currently being remodelled by Costain in joint venture with Laing O’Rourke under a £173M contract.
Farringdon will be the only station from which passengers will be able to access Crossrail, Thameslink and London Underground trains.
This makes it a key hub station for Gatwick, Luton, Heathrow and London City airports in addition to St Pancras international rail station.
Contract C435 will require construction of two 400m long pilot tunnels and, as with other station projects, includes full M&E works and architectural fit-out.
Crossrail is looking for the main contractor to put up a performance bond. Firms have until 3 December to complete pre-qualification questionnaires.