2a street gangs in British and Irish cities are made up of feral youngsters who grow up on social housing estates. They're involved in petty crime mostly, joyriding, robbery etc. The local scumbags, they're not organised to any great extent.

Some grow out of it and others fall in with the serious drug gangs when they get older. Research cities like Limerick in Ireland for instance and the Southhill and Moyross housing estates.