Only a few trusted aides knew of the Cabinet War Rooms buried beneath a 15-foot-thick slab of solid concrete in Storey's Gate off Whitehall. They were conceived in 1936, as a bomb-proof command centre in case of a war with Germany. Rance, who had previously been in charge of charwomen's wages, was asked to clear a series of underground rooms and fit them out with tables, chairs, lights, camp beds and supplies.