The regulator said that from July 28, Royal Mail will be allowed to deliver second-class post on alternate days from Monday to Friday only.

Ofwat said its investigation found a ‘range of failures’ in how the water company managed its wastewater treatment works and sewer network.

“Zonal pricing would have added risk at a time when the UK needed to accelerate its clean power transition, making energy bills more expensive. This decision reaffirms the UK as a world-leading ...