Frelon
I'm not sure that was necessarily the case: why would HQAC institue a policy ruling out weekend gliding for the CCF, when the schools concerned could simply refuse to let their cadets take up the offer? I've a feeling that CCF units tended to be offered week-long courses, rather than a series of weekends.
My gliding course was in the May half-term at Swanton Morley, but the nearest unit to my school was at Linton, some 40 miles from home and impossible to commute, even if I'd been offered a staff cadet post.
Like many others who have commented on this long-running thread, Air Cadet gliding made it possible for me to do something that I could never have afforded to do. It's a great shame that such an inspiring activity has ground to a halt.