Cyclists will stage another mass protest later tonight demanding Boris Johnson to redesign London's streets, saying they need to be made safer for cycling.
Three cyclists have died on the capital's roads in the past three weeks.
Luke Handrahan reports.
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David Cameron said the Met proved it can "do more with less" and declined to criticise the Mayor of London for his water cannon spend.
A group of disabled activists threw toys and balls at him as he entered the conference.
A wet start to the week and the unsettled weather is set to continue over the next few days.