"I want [pupils] to give the right impression."

Research led by Lancaster University showed that 70% of the excess phosphate in the Wye comes from agricultural waste.An estimated 23 million chickens are produced in the river catchment every year.

The government's draft proposal includes changes to planning regulations for poultry farms and grants for farmers to build incinerators to process poultry waste.Campaigners, however, said the government plans did not address the issue of factory farming.Charles Watson, Chair of the charity River Action, said they welcomed the government's plan "in part".

"I fear we've been here before. There is a thundering silence on critically important actions such as banning new intensive livestock production units," he said.Tom Tibbits, Chair of Friends of the River Wye, welcomed the funding for buffer strips but said moving chicken muck elsewhere was not an environmental solution.

"I have to say I'm frankly disgusted that my tax receipts could be put to such short sighted and one-sided actions to allegedly reduce river pollution."

A father who took his seven-year-old son to a riot at a hotel housing asylum seekers has been jailed.It has previously concluded there was a "clear connection" between the disorder in England and posts on social media and messaging apps.

Sir Andy made the remarks as His Majesty's Inspectorate of Constabulary and Fire and Rescue Services published its second report on the police response to the riots, focussing on the impact of social media.More than 30 people have been arrested for posts they made during the riots, which were sparked by the killing of three children in Southport.

Among them were Tyler Kay, 26, and Jordan Parlour, 28, who were sentenced to 38 months and 20 months in prison respectively for stirring up racial hatred on social media., the watchdog found police were unprepared for the scale of disorder that broke out in parts of the UK.