Innominate
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.
I don't think it has ever been a HQAC ruling, more a case of the CCF schools putting a block on it because of students' other weekend commitments combined with distance to travel obstacles.
At my VGS we carried out 3 continuous 10 day courses (Easter, Whitsun and Summer) every year with 20 CCF cadets (from CCF units all over the country) on each course. Great days.......