All 11 water and wastewater companies in England and Wales are now under scrutiny over sewage spills, after the regulator said it was expanding its investigation.

This week, Ofwat opened enforcement cases into four more firms – Dŵr Cymru Welsh Water, Hafren Dyfrdwy, Severn Trent and United Utilities – as part of its probe into how companies manage their sewage treatment works and networks.

It began its investigation in 2021 and if found in breach the companies face being fined.

Reported by the BBC, the Guardian and elsewhere