Haha, no problem! I'm looking this stuff up anyway, so I might as well share it, nice to know someone actually reads it!
I just find it interesting too. I don't like that it happens but I like to know why it has when it has, that is the bit it is hardest to get info on a lot of the time though.
The Ramesis incident yesterday reminded me of a (Fabri) Topspin accident in 2000 where the gondola snapped off and fell into the queue line(!) which I looked up again and found an interesting article on the cause.
As usual a major factor seems to have been poor maintenance that should happen to check for fatigue but didn't. At least with Chessington it seems all safety systems held up avoiding injury, I do wonder if that is partially luck though; if it had jammed in the same immovable way but upside down things could have been worse.