I was working at the National Theatre that day, we had about 5 or 6 groups of early teens schoolchildren from all over the UK who were studying drama and got to perform their play in the Cotteslow at the NT to mark the end of their course. Most of the groups had arrived before anyone really knew what was happening but one group hadn't shown up, I was outside having a cig when they finally did arrive, they'd been on one of the tubes that had been blown up and when the rescuers got to them they had to lead them out through the carrage the bomber had been in. I'll never forget the looks on those poor kids faces. They got them inside and tried to comfort them as much as you could till their parents arrived to collect them. the rest of the groups were basically stuck as public transport had stopped and their families weren't due to arrive till later on in the day when the performances were due to start so we just carried on with their rehearsals to keep their minds off it all, there wasn't really anything else we could do. Every theatre in London was closed that night except ours, we'd asked the kids if they wanted to still do their performances and every one of them said yes.