INFORMATION:

During the war, as the area was of such strategic importance the locals were always "on guard" & looking out for enemy aircraft. After taking the precautions to camouflage the site by building it in a wooded hillside, it seems totally improbable that given the huge area of farmland surrounding it, an enemy aircraft would actually accidentally crash into this site. But it did on March 16th 1941. A German Junkers 88 bomber, which was in difficulties after a bombing raid to Avonmouth, crashed into the site and blew to pieces. The pilot & three crew all survived.