Number of gangs in London

The Metropolitan Police reports that there are 250 gangs operating within London, with 62 designated as “high harm” gangs.

Gang members in London are believed to be responsible for 50 percent of all shootings, 40 percent of all robberies, 20 percent of all stabbings, and 17 percent of all rapes within the city.

Source:  Chris Summers, “Met Police fight gang crime by banishing ‘glamour’,” BBC News, February 8, 2012.