A Thames Water spokesman says the water is not sewage.
They say it is the result of a burst water main, which had mixed with silt and mud.
Engineers are on site working to manage the problem.
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A round the world yacht race set off from London today on a year long journey which will see them circumnavigation the globe.
The shortlist for the ugliest buildings in the country has been finalised with four of them coming from London.
Hundreds of thousands of people turned out for the Notting Hill Carnival today with the weather just managing to hold off.