It makes strategic sense for a Nation wanting to play a part on the world stage and remain at the forefront of NATO operations to have a Tanker capable of refuelling all receiver-capable aircraft. I'm not so convinced about the benefits of also adding a UARRSI to their A330 MRTTs, but it would make for a complete package.
With other nations having proved the operational capability of the aircraft and AAR systems, and with individual crew members having gained significant experience in training and operations, it should be fairly straightforward for the RAF to introduce a boom and UARRSI.
Should.
