The chain denies claims that its suppliers are leaking waste into the river.

The BBC's David Gregory-Kumar and Shefali Oza examine the issue of flooding in the West Midlands.

Lawyers representing more than 2,000 complainants are expanding their claim to cover to Welsh Water.

The government has withdrawn a £35m action plan for the river, saying any solution needs to involve Wales.

A canoe coach who regularly trains in the water says the leak has caused his lips to sting.

A boom and absorbent sheets have been placed around a drainage outlet to stop the oil spreading.

Welsh Water confirms a form of oil has got into the river, adding it was investigating the source.

Councillors fear run-off from chicken farms is turning the rivers Severn and Wye into "open sewers".