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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Those vying to be named the new Met Police Commissioner will speak to the Home Secretary, London Mayor and Policing Minister.
Monday's temperature was recorded at Kew Gardens, west London, where visitors enjoyed temperatures 10 degrees warmer than Milan at 8C.
The Central and Waterloo and City lines will be affected, with other stations and lines likely to be busier than normal.