just got this in an email from a mate in London....
http://news.bbc.co.uk/1/hi/uk/5193486.stm
cracked me up...

The school's head teacher, Chris Watts, took the decision after the temperature in the classrooms hit almost 35C (95F) on Tuesday.
This, he said, led to a teacher being sent home with heat exhaustion and children on the brink of collapse.