Don't know if this article is of interest Dave but it does give some Stats for No1 GC (Swanton Morley)
Excerpt from this website .....
https://hang-out.co.uk/uploads/RAF-S...structions.pdf
NO 1 GLIDING CENTRE
No 1 Gliding Centre was originally formed at Detling, Kent, as Home Command Gliding Instructors' School. Its task was to train instructors for all the Air Training Corps weekend Gliding Schools at the time of the expansion of the organisation. With completion of that task, the Unit moved to Hawkinge in 1956, taking on its present commitment, and came to Swanton Morley in January 1962, when Hawkinge closed.
The Centre is not only responsible for training ATC and CCF Cadets to the ATC Proficiency and Advanced Gliding Standard each year, but also trains gliding instructors required by the weekend Schools.
In addition, each Gliding School in the Southern half of England is inspected at least three times a year, and all their instructors tested to see that they maintain safe standards. Finally, one Primary Glider Instructors' Course is run each year.
In the fourteen years ended 31st December 1969, the unit completed the following:-
Launches - 228,563
Flying Hours - 228,563
Cadets Trained - 5,088