Step change: This public art gallery at 13 Berkeley Street, London, was designed by Alan Irvine in association with Dannatt, Johnson architects for the Fleming-Wyfold art foundation. The £1.1m shop conversion houses the Fleming collection. The lower area of the building has a structural glass staircase formed from glass panels 44 mm thick. The contractor was Killby & Gayford, structural engineer was Waterman Partnership, M&E engineer was Jonathan Hart Associates.