iPlayer has a documentary on what happened to the city of Bath after the war, the plans of Patrick Abercrombie & Buchanan and the attempt to preserve the past.
"Series charting the development of the conservation movement in Britain since the Second World War. Architectural critic Tom Dyckhoff describes how Bath, widely regarded as Britain's most beautiful city, was almost destroyed by Hitler's bombs, before narrowly escaping further damage from developers. Plus, a look at the birth of the listings system."
Bath in Time website