Is it time to bin this lot and fund the BGA with lotto money to run the 'Air Scouts' then the Air Cadets can be affiliated to fly. Give them all the old air frames and let them work it out.
It's the BGA clubs which do the flying, not the BGA itself, and I doubt many of the clubs would welcome an unworthy airframe being dumped on their doorstep. It's quite enough to keep their own gliders (and paperwork) airworthy.