Late seventies on an ATC Squadron near Bristol, we were honoured by a visit from a lovely old gentleman who had been SWO at RAF Manston during the Battle of Britain, then went on to QCS. He was one of those rare chaps whose quiet charisma preceded him into the room. We got him to take the cadets for some drill, and they performed as never before or since.
What I particularly remember is his proud claim that he had never had to use foul language with any squad.
They dont make 'em like that any more....