Debt-laden company has faced questions over financial stability and ability to raise funds.

The biggest investor in Thames Water has cut the value of its stake in the debt-laden utility company, which has faced questions over its financial stability and ability to raise crucial funds.

The Ontario Municipal Employees’ Retirement System (Omers), a Canadian pension fund that owns a 31% stake in Britain’s biggest water supplier, reduced the valuation put on its investment last year, it has emerged.

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