If it wasn’t a C141, then it was probably a C5 or C17, The KC135s tend to come right over my house if they are on an extended circuit, but I saw a high, swept wing aircraft passing just North of me (Warboys, 4 miles from RAF Wyton), which I presumed to be a C141, but am willing to be corrected!!
What struck me when visiting the ‘hall was the lack of aircraft compared to 20-25 years ago when I was taken up there regularly. Obviously there are less fighters/bombers to refuel in Europe now, and there is not the Logistics requirement there was during the cold war. There used to be stacks of KC135s C130s and C141s with the occasional Galaxy, it all seems a bit empty now….
You are right there, i remember as a kid going to Mildenhall on a sunday afternoon and would always see something take off or land. Even lucky enough to see one of the SR-71s take off sometimes. The last month or two has seen some interesting movements but still not how it used to be.