Plan to stop Lake Windemere sewage could cost customers billions

It’s England’s largest natural lake and a Unesco world heritage site, but Windermere has also been at the epicentre of the arguments over sewage.

Now, though, environmental campaigners and the local water company United Utilities have come up with a plan to build a huge sewage tunnel, coming at a cost of more than £3.6 billion.
Producer: Rob Windscheffel