Oh my G what a difficult airplane to fly, I don't mean the handling when you fly it by hand because that is a dream, I mean the planning part. Which I guess it very real to how it was. I read that a certain point towards the end of the flight tha CG is moved so much that you cannot compensate for it which makes it impossible to maintain supersonic flight. The trick was to get to that point just when you needed to descend and enter subsonic speed again.
Well not sure about my training flights. I have done a bunch. I'm on my way back from KIAD to EGLL for my sixth training flights. I could have stopped at four I guess but I really suck at flying the Concorde and I need practice.
Anyway, What I have done:
* ran out of fuel, twice(!!!) and had to do two interesting descents and landing without engines. I landed safely on the runway (first one in the middle of the desert at OEPA and the second one at KJFK), but it was embarrassing, very embarrassing. But very good to learn, it doesn't so much glide as fall out of the sky in a semi-controlled way

It uses colossal amounts of fuel at lower levels if your'e not careful, I'm careful now

* I have forgot the landing lights on above FL100, since it climbs like a freakin rocket and I had my hands full at just flying and taking care of the systems.
* have flown faster than 250IAS below FL100, have a really hard time of getting it to slow down and I am pretty sure they didn't have to extend the gears every time they wanted it to slow down, maybe it's a model problem.
Well, not sure if I have passed the training flights but it's been a learning experience, and if I have to do it again I will. Now I'm feeling quite confident, the last 2 flights have gone ok, i.e. no running out of gas

Strange that I could start my descent with 17 000 kg of fuel and still run out...
