'I tell you teachers don't have a job where people try to stab them, unless they're at a particularly rough school.'

Oh yes, happens all the time doesn't it. It's more dangerous to work on a building site than it is to be a copper. How many hours does a copper spend outside in the street on an average shift? In February 2009 police officers spent less than 15 per cent of their time out on patrol. I doubt if that has changed.