pr00ne, yes, currently the A330 is supposed to be replacing the TriStar as well as the FunBus as you say.
But I hear that a large amount of money is currently being spent on the TriStar flight deck upgrade and improved DASS. It would be folly of the highest order to throw away such aircraft if they had any remaining life in them - or if no life extension programme had been fully investigated.
14 aircraft to meet the entire UK AAR and jet AT needs...... Heaven help the poor guys in the sand if that's all there will be in future. And will the RAF still be using unsuitable tactical transport aircraft in the strategic passenger role? Troop seating in the A400M (I wonder how they're going to get that through certification?) is only marginally less awful than that in the bowels of Albert. Surely the RAF can do better than that for its passengers?