Gosh, that is so sad to see. I actually went on a corporate flight safety course there in 2015 and remember going in the 737 mock-up you see at the start of the video to learn how to open the over-wing exits and main doors. The whole afternoon was a very valuable experience and you do learn some useful stuff, like quite how heavy those over-wing exit doors are! We also had a go on the escape slides and well as the smoke chamber, experiencing what it was like to exit at ground level as the smoke and heat got more and more intense. It gave me a renewed respect for how highly trained flight and cabin crew are. I’m guessing BA Flight Training has ceased to run these courses now.