If you have an hour and a half to spare then I thoroughly recommend this film. It's available to view now on BBCi player in the 'films' category.
www.bbc.co.uk/iplayer/episode/b00rfp72/Sugarhouse/
Andy Serkis is superb as the Ulster psycho drug dealer on a tough London estate. The whole cast is superb in fact, and it's real edge of the seat stuff throughout.