AT fleet charters
BA have a number of 747-400 a/c stored in USA that would be eminently suitable for ME trips, with onward conections to theatre with RAF DAS equiped aircraft.
Crews are not a problem.
I operated to the Falklands after the war on BA 747 charters and wondered why they did not continue. Probably more expensive than the knackered old aircraft the MOD presently charter.