Two schemes by Daniel Libeskind Studio were admired but were not complete in time to be formal entries this year. The Imperial War Museum - North (above left and top), on the Manchester Ship Canal, would certainly be a strong contender for the next awards.
The museum design reflects the ravages and implications of world conflict, and the way in which the world split during the last great war. The design comprises three interlocking shards representing the fragmentation of global conflict.
The use of aluminium for the cladding and roofing of the large span structure was a fundamental step in realising the project.
Aluminium extrusions, with their unique structural capacity, were the only elements that could span across the four 80m levels and provide a finish to the exterior and interior of the building.
By contrast, the pavilion for the Serpentine Gallery in London's Hyde Park, is a discreet but distinctive design (above right and centre), which has now been completed using aluminium donated by Hydro Aluminium.
The pavilion will be used throughout the summer for talks and receptions.