I too was in the ATC. I still have my F3822 ! I was in 2214 Usworth Sqn conveniently located across the road from the then RAF Usworth. My pal worked their as a 'tarmac hand' before he joined the RAF. So I always got a 'heads up' whenever there was flying to be had. I also earned 'my keep' by cleaning the a/c etc. I did so much flying that some of the other cadets complained. So the CO forbade me to fly without his permission. On the advice of one of the DUAS instructors I still flew but always 'forgot' to get my F3822 signed.
In those days flying was still an adventure but kids have been to the moon and back from their armchairs and there are innumerable other distractions.