Boris Johnson is meeting high-powered investors this afternoon, including those already pumping money into London.
Current investments in the capital by Chinese companies include a £700 million 5 star hotel scheme on the South London Nine Elms site, a large stake in the company that owns Thames Water and the £500 million pound reconstruction of the Crystal Palace.
Chinese companies are also backing the billion pound Chinese business district planned in the Docklands and have a £450 million stake in the holding company that owns Heathrow Airport.
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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.