Essentially it would sub-contract out the job of teaching Gliding and flying whether it be conventional and/or motor glider.
However in the UK I think it's fair to say the BGA are
the experts in teaching gliding, plus there are many more BGA sites which will reduce the amount of traveling for most cadets. If you want them to learn to glide the BGA route seems the best by far to me, however if you want them to learn to square bash etc. it would be absolutely hopeless!
So let's hear it - what is the real point of ATC gliding? Teaching cadets to fly a glider, or something else hung on a bit of gliding?