More on the safety ligitation threat in today's Telegraph:

Teachers should abandon school trips because of the danger of being sued in the event of an accident, a union has warned.

A new test of the "educational validity" of trips should be introduced to cut down on unnecessary risks, said the NASUWT.

Last month, education watchdog Ofsted said too many schools did not take children on outdoor activities because they feared they would be sued if there was an accident.

Canoeing, field work trips, rock climbing and other pursuits help pupils develop their physical and social skills, according to the Ofsted report.

But Chris Keates, the union's general secretary, said society had become "increasingly litigious" and no longer understood the idea of a genuine accident.

That last bit sounds about right. But of course, being a union, all they can do is refuse to do whatever it is. No positive suggestion is being offered here. Still, they are at least flagging up the problem.