“It’s so important that we turn out in force at the court hearing to call on the government to block the bailout and bring Thames Water into full public ownership.

“As a coalition of MPs, billpayers and water campaigners — we’ll be there representing the environment and customers that water companies have abused for too long.”

The government is in talks to potential administrators should Thames Water go bust and it needs to temporarily renationalise.

Mr Topham added: “The Environment Secretary, Steve Reed, has the power to step in and end this chaos, stabilising not only the future of our water resources but also the wider UK investment landscape.

“If he fails, we face a consumer bailout at eye-watering interest rates that could set a dangerous precedent.”