Bovingdon
The hole full of USAF equipment is very probable as the US Navy did the same thing at Hendon when they moved to Blackbushe. The secret is to find an old fart that remembers where the hole was?? And, this one had already gone to Stansted when the USAF packed up at Bovingdon.
I probably worked with "Bill" what was his surname??
The Nord 1002 that I refered to was at Northolt from 1959 until I left in '62. It lived in a hangar West of the tower together with the RCAF C-47 that is now the one with the B of B flight. As I said it never flew and most certainly was never a '109 stand-in.