RAF Harwell

[3] Between 1938 and 1940 it was a development site of a prototype Royal Aircraft Establishment Mark III Catapult, whose intention was to enable take-offs using shorter runways and so the planes could be loaded with more fuel.

Although technical problems caused its abandonment without ever launching an aircraft, it proved to be a precursor to Catapult Armed Merchant ships.

38 Group RAF, initially used for leaflet missions over France using Vickers Wellington bombers, later bombing raids on Bremen, Cologne and Essen.

These included carrying the first glider-borne troops into Normandy to secure vital strategic positions in advance of the main landings on D-Day.

The RAF station was closed at the end of 1945 and the site transferred to the Ministry of Supply on 1 January 1946, where it became the Atomic Energy Research Establishment.