Boris Johnson has announced £750,000 worth of investment in London's TV and film industry.
Speaking at the Ealing Studios, where Downton Abbey is filmed, the Mayor said it would help create 1,000 jobs and bring work to the capital's creative companies.
He also tried his hand at directing an animation scene in the special effects studio which he excitedly described as 'oh my god that's fantastic'.
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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.