The version on Fighter Control is that four of the six B-52 currently on deployment at Fairford went out on a mission over Poland yesterday. Two were due to return to Fairford, and the other two were scheduled to return to Minot direct from Poland. However their refueling tankers were out of crosswind limits (Mildenhall presumably) and couldn't launch, hence a late decision to return all four to Fairford. However the Minot-bound pair were overweight for landing and hence orbited Gloucester for an hour and a half burning off fuel. During this, one of the pair picked up a crew entry hatch warning light and declared an IFE and corresponding squawk of 7700. It landed safely and was met by the airfield rescue services.
Five of the six have departed today back to Minot, with yesterday's IFE aircraft the one left at Fairford for now.