Currently all KC-135R/T models (Receiver capable) are with the 22nd Air Refueling Wing at McConnell AFB, KS. Most of these are used for force extension and Special Operations missions, and are crewed by highly qualified receiver capable crews. If not used for the receiver mission, these aircraft can be flown just like any other KC-135R.
Didn't think the majority of 135's have a UAARSI to be refuelled. Was it definately 10 refuelling a 135 or might it have been the other way around ? 135 refuelling a 10 is quite common (I'm off to try it in about 6hrs myself...)
FFP,
It was not a Mildenhall based KC-135R but one based in CONUS. As far as i am aware it was the KC-10A (from McGuire) leading the KC-135R but seeing as you have far more experience in them, i'm not doubting you, so you are probably correct in which position they were in. Either way, one was refuelling the other, why i don't know, unless it was literally just for training purposes as the leg between the UK and Lajes isn't that far!
Thanks for clearing it up.