It's emerged the flood in Herne Hill will cost Thames Water and its insurers around four million pounds.
Dozens of businesses and homes were left under water on Half Moon Lane early on Wednesday morning after a pipe burst.
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The property developer painted the mews house in March last year after she was denied permission for a basement below the property.
Profits at the estate agent plummeted 42% in the first half of the year.
Ionut Gheorghe, 27, was detained in Los Molinos near Madrid on Friday by Spanish police under a European Arrest Warrant.