Phil Stride, Head of the Thames Tideway Tunnel at Thames Water, says the company may not stand to make any profit from the project.
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Thousands of people turned out in Trafalgar Square for a free screening of Oscar nominated film The Salesman
A baby dolphin has been spotted swimming in the Thames near Embankment pier.
The Olympic champion released a statement after a newspaper alleged his American coach may have broken anti-doping rules.