Ah, the Knight Twisters! In Janaury 1977 a friend and I made a really thorough job of Biggin Hill, peered in every shed and hut that we could and still didn't manage to see the Twisters that were supposed to be there. There was also supposed to have been the nose of a Lancaster with Vendair - there was a shed with Vendair on it; the nose might have been the one now at Lambeth. We did see plenty of wrecks though - but not Cobbie Moore's Gipsy Moth wreck, despite him letting us take a turn around Surrey Aviation! Nice to see that one's flying again.
Interflight - yep, they had the yellow and black Aero Commander 520 ('SJU?) and a Air & Space 18 gyrocopter (and the remains of another) lived in the same blister hangar! Whatever happened to that? Those blister hangars were amazing, one occasion there was a US reg'd Learjet shoehorned into the one next to Express Aviation!