XA903 was the Blue Steel trials aircraft and became the Rolls-Royce test bed for Concorde Olympus and Tornado RB199 engines also had an experimental 27mm canon fit. She made the last flight of a B.1 at Farnborough and was broken up in 1984. The nose went to the Wales Aircraft Museum that year, followed by Sidcup, London by 1993. Preserved at Wellsbourne Mountford since 1999.