Rolling Thunder,
There were quite a lot of Concorde flights to Kai Tak over the years. The first was Air France which was a checker board approach (got out of bed on a damp Sunday morn to watch it arrive). At one time BA had a deal with Cunard where you could fly Concorde to HKG and return on the QE2 or vv so there were regular arrivals in the summer for 2 or 3 years. Normally Concorde was required to take off on 13 presumably for noise reasons. The BA/Cunard flights usually departed around noon. On one occasion I saw a BA Concorde taxiing to the end of 31, so phoned home to tell my wife to go up on the roof as we lived close to the flight path but she was out so missed out on a great sight and a great noise! There may have been other 31 take offs but that was the only one I witnessed.