The UK's biggest water company has admitted it paid no corporation tax for the last three years.
Thames Water, who saw revenues of nearly £2 billion and above inflation price rises, said they were not performing a "tax dodge" but were following the government's rules.
ITV News Business Editor Laura Kuenssberg, has been hearing how they do it.
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Thousands of gallons of waste, including rotting animal carcasses, are being dumped in the countryside, an investigation has found.
Rain in the north tonight, cloudy and humid in the south
In an exclusive interview with ITV News, 100 metre world champion Justin Gatlin also said that booing at the World Championships "did hurt".