Concorde was a British-French aircaft, so it was allowed to fly over the UK. If it had been American, it would have been banned instantly. It was horrifically noisy.
I saw it land/take off a handful of times as a kid. The noise was unlike anything else I've ever experienced - you could hear it many kilometers away and up close (on the airport boundary) you'd feel every internal cavity vibrating when it departed. As a child it was marvellous!