It was billed as the most environmentally friendly festival ever, with a climate change campaign taking centre stage and an array of green facilities intended to help revellers cut down on their carbon footprints and their waste.

Yesterday, however, Glastonbury's eco-credentials were undermined somewhat when it emerged that festival-goers urinating in a river that runs through the site - after they had been drinking and taking drugs - had left it dangerously toxic for the surrounding wildlife.

An emergency team of self-declared "green police", who are patrolling festivities to ensure minimal damage to the environment, were ordered to cordon off Whitelake stream after the Environment Agency informed them it contained levels of ammonia so high they were life-threatening for fish.

Thanks to reader Jon Pinnell for the link.