I just saw this on BBC's website. It corroborates what the survivors have been telling the press. I think the boy sitting next to the terrorist with his foot on the detonator survived, because I remember reading the account of a boy (I can't remember where, I've read so many articles on this) who said he was sitting right next to a man who had his foot on a pedal, and a woman next to him telling him that if he pressed it, a bomb would go off.
The survivors have given excellent descriptions of what happened inside that school.