Millions of litres of raw sewage were illegally pumped into one of England’s most famous lakes after a fault, documents seen by the BBC have revealed.

United Utilities failed to stop the illegal pollution of Windermere, in the Lake District, for 10 hours in February and did not report the incident to the Environment Agency until 13 hours after it started.

An almost identical incident occurred at the same location in 2022.

The firm says it took urgent steps to resolve the incident in February.