Foreign Office Architects, Grimshaw and Wilkinson Eyre are battling it out to design the £1bn Euston station redevelopment for British Land and Network Rail.

Network Rail named British Land last April as its preferred developer for the north London station and its surroundings.

Now it is in talks with the architects to design a 100,000ft2 terminal to replace the sixties building. Both Grimshaw and Wilkinson Eyre have experience of large-scale railway station design – Grimshaw at Waterloo International and Wilkinson Eyre at Stratford, east London. It would be the first such commission for FOA.

The 3.5 million ft2 scheme has been masterplanned by Leo A Daly and V3 Architects. It will provide 2.5 million ft2 of residential and commercial space, 250,000ft2 of retail and leisure space, and passenger and transport facilities.

British Land is expected to appoint an architect in April, when it will seek detailed planning for the development. Construction is expected to begin in 2011.