Why dont the MOD waste £billions and have the Tristars converted into a new MPA? take out the refuelling equipment and replace with bomb bays and sonar bays. take out all the pax seats and put expensive games consoles in, hang a great bulge of a radar unit under the nose. Leave the nice big Galley in for the pie eating AEOp's (sorry WSOp's). Fly them out of a former Scottish airbase that has now been turned over to the Army.
Why not? they converted an airliner for this role before. I'm sure British Waste of Space could come up with a very expensive solution for the government to squander £multi-billions on.