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The Notting Hill Carnival features hundreds of costumes, performers and floats every year

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It is estimated that more than one million man hours are spent preparing for the carnival

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It began as a small-scale event organised by local West Indian immigrants

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And now it is celebrating its 40th anniversary and more than one million people are expected to attend

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During its three days 80 CCTV cameras will keep watch over the carnival route

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About 30 million sequins are sewn onto costumes for the weekend

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The theme of this year's parade is freedom and justice