Gang related organised crime in the United Kingdom according to the Serious Organised Crime Agency is concentrated around the cities of London, Manchester and Liverpool and regionally across the West Midlands region, south coast and northern England . With regards to street gangs the cities identified as having the most serious gang problems, which also accounted for 65% of firearm homicides in England and Wales, were London, Birmingham, Manchester and Liverpool . Glasgow in Scotland also has a historical gang culture with the city having 6 times as many teenage gangs as London, which has ten times the population, per capita .