My first ever visit to RAF Colerne was for the Battle of Britain "At Home" air show in September 1964. I think that was the first year the aircraft of the museum collection were on show. Lovely weather - the first and last time I saw a camouflaged Valiant flying, the Dutch Air Force had a team of four T-33s with a F27 Troopship support aircraft, a gleaming polished silver USAF Hercules and lots more goodies.
Made 'ad hoc' visits as an ATC cadet and was always made very welcome to take photos of the Hastings and the first RAF Hercules to appear in its brown camouflage colours.
I went to the airshows every year after that and have good colour slides taken at them all. I think the last show there was 1972?