Environmentally damaging levels of drugs have been found in the river running through the Glastonbury Festival site.
Scientists have warned there are “dangerous” levels of MDMA and cocaine in the Whitelake River in Somerset.
They suspect public urination has caused the increase and urged festival goers to use the toilets provided.
Researchers fear it could derail the conservation efforts of rare European eels in the area.
Measurements both upstream and downstream of the site were taken before, during and after the festival in 2019.