Someone knocked up some nice drawings of a Concorde tanker based on the B model, aimed at spec ops tanking/fast dash for specific operations etc. The development of the B model was pretty far along, especially the tech for the revised true supercruise Olympus engines (no re-heat). Ah, the joys if there had been a massively bigger budget to tinker where you wanted (Vulcan B.3 especially, 80,000lb bomb load, up to 6 Skybolts, 4 modified 30,000lb+ thrust Olympus engines and hugely increased range), if the B-52 can survive this long a super moded Vulcan as a stand off strike platform would have been tasty even today. Hell, even the Chinese Tu-16 variants are still in production and pretty capable.
The joys of a good what if!