You are a bit older than myself Plado but I do recall logging G-ANOK at Turnhouse on a spotting trip, although I don't have an exact date - I think in the 60's would that have been possible?
I remember my first trip to Luton in 1968 and how helpful the staff were to myself and a friend. We were allowed to go into the hangars but told to not
touch anything and to stay away from the busy apron.