Much of London woke up shrouded in fog this morning. Some of the capital's most famous landmarks were barely visible. Here's how the city looked as Londoners made their way to work.
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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.