After winning an international design competition, Max Fordham joined with Witherford Watson Mann Architects to extend the building and create a gallery that is coherent and fluid.

The services strategy was designed to ensure that the installation did not compromise the building's aesthetic. Offering flexibility of use as well as contemporary standards of access, the galleries are served by a single, unified circulation core.

An extensive ventilation plant serves the two archives and three conditioned gallery spaces. The lighting was designed to contrast the various textures of the gallery interior.