Chuncky M
From what I understand about HC it dealt with failings within the MOD. The civilian airline sector, at least in the UK, is regulated by EASA. The point is that it is an external agency that is the regulator whereas the MOD was self regulating pre HC. Just my understanding of course and I'm sure there are lessons within the HC report that would read across.
Regarding gliders and mandatory transponders I'm not sure what the latest technology can offer but of course the open FIR is just that, open. Lookout, lookout, lookout!