Concorde development was a (UK & France) national project. They would have had easy access to military aircraft. Aircraft like the Lightning might only just hav

Concorde development was a (UK & France) national project. They would have had easy access to military aircraft. Aircraft like the Lightning might only just have been able to intercept but would easily have observed pre-arranged tests. I wasn't on the engineering team ;) but apparently they planned 4000 hours of test flights. https://web.archive.org/web/20150316210132/http://aviationweek.com/site-files/aviationweek.com/files/uploads/2015/02/1969-%20First%20Concorde%20Flight%20(2%20of%202).pdf https://web.archive.org/web/20150316210132/http://aviationwe... It's almost inconceivable that the test flights would not have been closely recorded, especially the significant ones including trans-sonic and supersonic ops. Despite the best design and air-tunnel work, you'd expect that things would go wrong and you really want to learn as much as possible from any incidents/events. Unfortunately, all this happened well before the internet age, and so records and images are not so easily found :(