NS Flying
Al R would find your post interesting because it also suggests that a lot could be done in two years. I presume that they were piston Provosts on which your father trained. Ugly things which didn't seem to last very long.
I guess attitudes were different too because I remember a night sortie from Swinderby in a Varsity, the crew of which were all under 21. It was probably a carry-over from WW2 ideas about age and suitability. Mind you we lost a lot more aircraft in training accidents.