In fact the only realistic military use for Concorde (other than a fast target and research airframe) that I could see would be as a VIP transport,
I was thinking with it's sustained Mach 2 and high altitude, they would have made a damn good recce platform, almost a mini-SR71, and with the PR9's withdrawl due only a few years after Concorde there would have just been time for them to have been refitted, equipped in time.......
But, of course, we don't need that capability, and we don't have any funds......