The National Railway Museum has unveiled the design proposals from the architects shortlisted to deliver a £16.5m central hall for its York base.

Stirling Prize-nominated practices Feilden Fowles, Heneghan Peng and 6a Architects – the latter working with Office Kersten Geers David Van Severen – won their way through a field of 76 entries to the final stage of the competition in November.

They are joined by Carmody Groarke and France’s Atelier d’Architecture Philippe Prost to be in the running to create a new 4,500sq m space bridging the gap between the National Railway Museum’s two main exhibition halls for the first time.

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