"Parents of any obese four- or 10-year-olds can expect a letter telling them their child faces long-term health damage unless they lose weight."

How would you like to get a letter like that from your child’s school?

Starting next year, children in England’s primary schools will be measured and weighed and parents will be notified if their child falls outside a set of limits.

Sounds like a good idea, right? Maybe. What happens, though, when someone tries to introduce the next logical step, action against recalcitrant parents?

Young children need more exercise – BBC News