I think you'll find that the CV990 Coronado matched or bettered those speeds. I don't think there was a military version of this aircraft. My father in law flew the VC10 right up to it's last commercial flight with Air Malawi, then positioned it to BOH where, presumably it was broken up. When the 10 was flying for Gulf air he flew with many ex 10Sqn chaps. I asked this before but can't remember the answer, what was the piano wire for, stretched across the top of the flight panel combing?