Much of the protesting, from an estimated 4,000 people in the financial centre of the capital, was peaceful, but some bloody skirmishes broke out as police tried to keep thousands of people in containment pens surrounding the Bank of England on Threadneedle Street.

Selected photos:

http://mountainsageblog.com/2009/04/01/g20-protests-erupt-in-london/

More photos and story here:

http://www.guardian.co.uk/world/gallery/2009/apr/01/g20-protest?picture=345344194

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