Troubled utility Thames Water has said its shareholders will not be injecting the first £500 million of funding that was agreed last summer into the group as industry regulations make its business plan "uninvestible".Thames Water - the UK's biggest water supplier with 15 million households across London and the South East - said the funding plan drawn up last July was subject to conditions, including a business plan that is supported by "appropriate regulatory arrangements".

Troubled utility Thames Water has said its shareholders will not be injecting the first £500 million of funding that was agreed last summer into the group as industry regulations make its business plan "uninvestible".Thames Water - the UK's biggest water supplier with 15 million households across London and the South East - said the funding plan drawn up last July was subject to conditions, including a business plan that is supported by "appropriate regulatory arrangements".