The Tu-144 crashed at the Paris air show in 1973, basically finishing the Concordski programme.
A few years later I was speaking to a Concorde pilot (one of those, incidentally, who left his cap in the expansion joint on his plane’s final flight – the gap closed up when the plane went sub-sonic – so his cap is still on display, trapped, to this day in the museum) who sheepishly boasted that the Concorde pilots were aware of a fatal weakness in the Soviet plane, so at the airshow they flew the Concorde in a manoeuvre that they knew the Tu-144 pilots would copy, but would cause it to break up. Which they did. And it did.
RAF banter! Tally-Ho!