I think the hangar to the right of the Pan Am Airbus picture was originally the Rotodyne hangar.I was at a Royal Aeronautical Society Garden Party in 1957/1958,I was 15 or 16 at the time and had hitch hiked there from Watford,our last lift was a member who took us in.To the east of that hangar was an older structure which contained Gannets for the German Navy.Fairey's preserved aircraft were displayed outside,a Fulmar and a Firefly I think.The highlight of the day was a display by the Rotordyne,very noisy!!I can't remember what else flew.
Colin.