One Londoner tweeted this picture of another challenge facing cyclists. A puddle, over 7 centimetres deep in one of the capital's Cycle Superhighways.
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The installation is the first in London by acclaimed British underwater sculptor Jason deCaires Taylor, part of the Thames festival.
Services through Kempton Park were suspended over the weekend due to an "obstruction on the line".
A leading sexual health clinic has apologised after mistakenly sharing the HIV positive status of hundreds of patients in an email.