Warminster fulfilled this function, and from there a fleet of army lorries would have transported staff to the CGWHQ site. About 210 senior Whitehall officials and their staff, similarly unaware of their destination, were to assemble at Kensington (Olympia) station on the West London Line, before setting off by special train for Warminster, then a short trip by bus to Warminster Infantry Training Centre. There they would be broken into small groups to conclude their journey with a lorry trip to Corsham. The Prime Minister was to remain at Downing Street until the last moment, before being transported to Corsham by helicopter. The facility was divided into 22 areas. Some areas were repurposed over the years, but the allocation of space in 1981 was as follows: Area 1: Air filtration plant (originally the General Post Office area including the telephone exchange) Area 2: Royal Air Force Operations Centre (originally offices and dormitories for the Board of Trade, Her Majesty's Stationery Office, Office of Minister for Science and Lord Chancellor's Department) Area 3: Royal Air Force offices and dormitory Area 4: Dormitory Area 5: Dormitory and stores Area 6: Kitchen and bakery Area 7: Canteen Area 8: Telephone exchange Area 9: Hospital and stores (originally a dormitory) Area 10: Ministry of Transport offices Area 11: Water treatment and stores Area 12: Canteen and laundry Area 13: Ministry of Power and Ministry of Agriculture offices and dormitory Area 14: Prime Minister, War Cabinet, Cabinet Secretariat and Chiefs of Staff offices and dormitory Area 15: Camp Commandant, Establishment offices and Lamson room Area 16: Central Office of Information, Ministry of Health, Home Office, Ministry of Housing and Local Government and BBC studio Area 17: Ministry of Labour offices and "special accommodation" suites Area 18: Admiralty, British Army and Ministry of Defence offices Area 19: Workshops and power generation Area 20: Stores Area 21: Communications centre Area 22: Foreign Office offices and dormitory In addition there were water and fuel storage areas adjacent to the water treatment and power generation areas respectively, not officially numbered but sometimes referred to as Areas 23 and 24. The "special accommodation" suites in Area 17 were larger than the others and were finished to a higher standard, each having private bathroom facilities rather than the communal facilities elsewhere. These suites are believed to have been intended for the Royal Family. Scheduled monuments In 2013, parts of CGWHQ were