I'm sure I read somewhere that when Concorde was doing supersonic test runs on the North Sea racetrack that it was offered to NATO as a high speed target, confined to simple stern conversions. And I think that only the Lightning got anywhere near it. I have no doubt that someone will be along forthwith with the gun camera photo's!
it did a figure of 8 around the North Sea, speed M2, average height FL560 to maintain constant speed.
There were set points and times which the Sqns used to drop and tankers and accelerate and climb to acquire at the pre-planned points. All tick in the box tuff, to put money in the pocket of BA before the charter market picked up.
Only remarkable point was the Binbrook Lightning with a radio failure which went to it's preset point (and ignoring the MRSA), not only acquired but did a stern intercept which, IIRC, was confirmed on the film.....