I have only handled Concorde twice in my career, but then I have never worked in its playpen, however, when it arrived on the doorstep in this part of the world on charters, it got a lot of priority....and deservedly so....its the true legend of the skies!
Apart from some very pointy, dark, frames of similar size that are regular customers here at the moment on hostile charter work....I have never seen a ground speed on my radar come close to it.