Thames Water is among several water companies to ask the economic regulator, Ofwat, to refer its Final Determination to the Competition and Markets Authority (CMA) for a redetermination. Others include Anglian Water and Southern Water.

The Board of the UK’s largest water and wastewater services company made the unanimous decision after concluding that the Final Determination for the regulatory period 2025 to 2030 does not appropriately support the investment and improvement that is required for Thames Water to deliver for its customers, communities and the environment for the next five years.

Photo credit: Suzy Hazelwood

The company wants to increase bills by 59% over the next five years, more than the 35% Ofwat had allowed.

Covered in The Guardian Thames Water launches appeal for permission to raise bills even higher

Also this week, the High Court has provided a financial reprieve for the company, approving a £3 billion rescue loan (reported by the BBC).