12 Upper Belgrave Street London SW1X 8BA
Internal alterations, including works at lower ground floor comprising excavation of vault floor to allow for new slab and waterproofing, excavation of new pit for installation of surface water pump, rearrangement of approved service trench route and partitions; other works at ground, first, second, third floors; unblocking and rebuilding chimney stack; and extension of chimney stack to accommodate approved mechanical ventilation.