LONDON - MARCH 26: Police stand guard on Westminster Bridge during a large austerity rally on March 26, 2011 in London, UK. Police were on standby after violent clashes with anti-cuts protesters.
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LONDON - MARCH 26: Police stand guard on Westminster Bridge during a large austerity rally on March 26, 2011 in London, UK. Police were on standby after violent clashes with anti-cuts protesters.