I dug out my BGA log book (of some vintage), because I wanted to check the longest duration flight made in the T.21C at Keevil,

Despite your ‘best efforts’ 😀 the glider in question is still around. It was sold to The Netherlands, then almost destroyed when the canopy blew open on launch and the glider hit a dune trying to make it back to the airfield. It was extensively rebuilt by new owners over a seven-year timespan, and is now flying again. Flew it last year. Lovely ship to fly, though visibility is exceedingly poor and aileron authority is somewhat sluggish. Climbs very well though.