And, isn't it a case of shutting the stable door after the horse has
bolted?
All the Concorde's have gone, or are going, to their new static homes -
there isn't a Concorde left to fly is there??

Well, they've (mostly) flown there and been put in a hangar. They haven't
been taken apart or anything like that as far as I know. Ignoring the
legalities, I would guess you could, for example, bring AF out of the
hangar at Filton, fuel it up and fly it tomorrow. Or today even... :-)
Maybe they've drained the oil, don't know...

I seem to remember hearing that engineers were standing by at Manchester to
make it unflyable the day it arrived?