Anti-capitalism protesters from the Occupy movement have begun a new protest in the City of London as part of a global day of action.
Other protests are underway in cities including Moscow, New York, Athens and Madrid.
Several hundred people have gathered outside St Paul's Cathedral for a rally, before moving on to demonstrate outside the offices of some of the largest firms in the financial heart of London.
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Figures released this week show a sharp rise in the number of people living on London's streets.
Newly released emails to a Muslim campaign group reveal Mohammed Emwazi felt "controlled" under the watch of the security services.
Tributes have been left in Caledonian Road in Islington where 15-year-old Alan Cartwright died after he was stabbed.