Thames Water’s creditors have offered the Government an unprecedented concession in a final attempt to prevent Britain’s largest water supplier from falling into state hands, underscoring the increasingly fragile future of one of the UK’s most strategically important utilities.
The consortium behind a proposed £10 billion rescue package said it is considering granting ministers a “golden share” in Thames Water, giving the Government veto powers over major corporate decisions as negotiations intensify with Andy Burnham’s new administration.
The move reflects growing political pressure after the Prime Minister signalled his intention to pursue a 10-year programme of water industry renationalisation, arguing that greater public control is needed to restore accountability and improve environmental performance.
London & Valley Water, the consortium leading the rescue effort, said discussions with regulators were continuing and that it was exploring “material improvements” to its original proposal following concerns raised by ministers.
Among the changes under consideration is a governance structure that would strengthen the role of local authorities and regional leaders, alongside the creation of a golden share allowing the Government to block significant asset sales, foreign takeovers or constitutional changes.
The proposal is designed to address one of the central political criticisms of the privatised water sector: that essential national infrastructure has been left without sufficient public oversight.
However, critics argue the offer does not go far enough.
The GMB union dismissed the proposal, insisting only full public ownership can resolve Thames Water’s long-running financial and operational problems.
“The private sector owners of Thames Water have failed consumers, the environment and the workforce,” said national officer Gary Carter. “The Government must take decisive action and nationalise Thames Water.”
The stakes are considerable.
Thames Water supplies around 16 million customers across London and the South East while carrying debts exceeding £20 billion. A previous rescue led by private equity group KKR collapsed last year, leaving creditors controlling around £17 billion of the company’s liabilities.
Although Thames Water says it has sufficient funding until October, its latest annual report warned there remains “material uncertainty” over its ability to secure long-term financing.
The consortium insists its plan would avoid taxpayer support, suspend dividend payments for at least a decade and deliver record investment in infrastructure and environmental improvements.
Yet the decision now rests with the Burnham government.
Temporary nationalisation remains under active consideration, with a decision expected within weeks. Creditors have indicated they could challenge such a move through the courts, setting the stage for what could become one of the most significant battles over the future ownership of British infrastructure since privatisation.
Beyond Thames Water itself, the outcome will offer an early indication of how far the new government is prepared to intervene in strategically important industries—and how willing private investors are to accept a new era of public oversight.
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