The contract, part of a £57m redevelopment at the Bank/Monument interchange, will provide a new step free entrance at the station giving passengers direct access to the Waterloo & City Line from Walbrook Square.
The design and build contract will include two 5.5m tunnels between the station box and the Waterloo & City line platforms.
Bank station is one of the busiest on the London Undergroundnetwork, serving 98 million passengers per year. The Bank-Monument interchange is served by five Tube lines – Waterloo & City, Northern, Central, District and Circle – as well as the Docklands Light Railway.
In a separate project TfL is also planning to redevelop the Northern line part of the interchange, which includes building a new Northern line southbound running tunnel that will create more platform space, interchange tunnels and an additional station entrance, as well as step-free access to the Northern line platforms.
The Waterloo & City line station 'box', which is being built by Sir Robert McAlpine as contractors working on media firm Bloomberg's new European headquarters, is an underground structure that will enable the subsequent installation of four new escalators, two new lifts and a new ticket hall. McAlpine will hand over the box to London Underground next summer, with the final fit out scheduled to be completed by the end of 2017.
David Waboso, London Underground's director of capital programmes, said: “The award of this contract is an important step on our journey to deliver a bigger and better Bank station that can meet the challenge of increasing demand and help to provide quicker and easier journeys for customers. The step-free Waterloo & City line entrance and ticket hall, with new escalators and lifts, form a key part of our upgrade plans for Bank, one of London's busiest stations.”