A few British gang related flicks I've watched recently, good movies.
Ill Manors (directed/produced by Plan B who is a British musician - soul/hip hop/electronic) probably the best of the bunch also a recent movie so quality production.
Kidulthood - older movie in the same mold, good watch.
Adulthood - sequel to the above, decent watch although suffers from being a sequel for sure.
This reminds me. Harry Brown is an awesome film in the same vein as these 3 films. Plus Ben Drews in it too! and it pretty much was brought to life in the Tottenham riots the other year. I dunno why it popped into my head but I'd recommend a movie called Cop Land to anyone too. Nobody ever seems to mention that movie but it has Stallone, DeNiro, Ray Liotta and all these big names in. Stallone actually packed on a load of weight for the role and puts in a (rare) good performance