Not a security film, but I appear very briefly in a WRAF officer recruiting film which was being shot at Feltwell in 1964. We were in the gym and were told to come and watch this young female cadet on the trampoline while they filmed her. I wasn't quite killed in the rush, and a young slim Officer Cadet TTN can be seen closely observing said girl bouncing up and down on the trampoline.
One of the better days at OCTU!