This included construction of the underground Central Government War Headquarters (CGWHQ), codenamed "Burlington", at Corsham in Wiltshire.
As nuclear weapons became more powerful and intercontinental ballistic missiles became more of a threat than crewed bombers, the concept of concentrating central government in a single location became flawed.
[3] Sites for dispersing government were selected in 1966 based on their existing accommodation, independence from the national power and water grids, nuclear fallout protection and distance from likely targets.
The chosen sites were RNAS Culdrose in Cornwall, HMS Osprey in Dorset, Taymouth Castle (then the Civil Defence Corps Training School) in Scotland, and either the helicopter support ship RFA Engadine or royal yacht HMY Britannia which would embark a Python group at Loch Torridon or Oban.
[1] The Corsham bunker, given the new codename "Turnstile" from 1963 and "Chanticleer" from 1970, would play an important part in the lead up to war but ceased to have a CGWHQ role other than as a possible aggregation point for Python groups some time after an attack.