I was at both Scampton and Waddington between 1974 and 1979. Each room had a station trigraph which was changed from time to time. Sorties were allocated a two-figure suffix by the ops clerks. On 44R, a certain captain who had a rapport with the clerks invariably persuaded them to allocate him “69”.
At this time, rangers going west were allocated a RAFAIR callsign whilst those going east were allocated a five letter callsign beginning with M.
I am uncertain about the Round the World pushes which were just fizzling out.