Dozens of protesters have set up camp outside the London Stock Exchange.
Protesters from 'Occupy London' have put up tents at Paternoster Square.
The camp was set up after today's annual May Day march in Central London.
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The Home Office has launched an advertising campaign which aims to deter people from carrying weapons.
Hundreds of pupils from Alperton Community School in Brent, London,cheered and waved flags as Andria Zafirakou arrived holding the prize.
Earlier, this week Kensington and Chelsea Council admitted spending almost £21 million keeping survivors in hotels.