A report by the Centre for Social Justice says the arrests of more than 200 leaders of London street gangs in the wake of last year's riots has led to an increase in chaos, violence and anarchy in the capital.
It says the removal of 'elders' from the streets backfired because it created a power vacuum in which younger and more hot-headed members seized control of gangs.
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Transport for London is not happy that its branding has been used.