Melchey,
I like your thinking - but lets make the super base Camp Bastion, put everything that is left in the rotary world of any use there, get some operational sorties (that doesn't cost the arm and leg and bound in political health and safety blah of UK exercises) and then rotate crews through the UK for R&R and to keep their families ticking over.
If we take it a bit further, then if we position all this kit and equipment overseas on a long term basis, we are nicely positioned for most future perceived conflicts (anything and everything from Iran, Korea, China and even our old sabre rattling foe Russia is all on the door step). But to the bean counters, hey presto - no need for expensive real estate in UK, so lets flog off some of these lucrative bases.
Hey General, now that is cunning plan of yours.