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.
More top news
Soldiers will replace armed police at many sites after security experts warned the Government that another terrorist attack may be imminent.
The threat level has been raised to critical by MI5's Counter-Terrorism Analysis Centre.
Sam Allardyce has quit as manager of Crystal Palace and retired from football management.