I saw this at a preview screening... it was a great atmosphere! Ashley Walters really impresses, are those really his teeth? He looks like he's been living in a sewer for a couple of years! He's trying to sell this gun to middle-class Steve Mackintosh, who has found himself for the first time on the wrong side of town as Walters takes him to his home- an abandoned old warehouse. Andy Serkis plays Hoodwink, who's this bloomin scary Ulster man who's somehow found himself on the local estate with his pregnant girlfriend and now runs it, oh and he's the original owner of this gun and he's not too happy that it's gone missing!
A special mention i think should go to Hoodwink's three henchmen/stooges. They haven't had much of a chance of being mentioned in the build-up to this film, especially when you have Walters, Mackintosh and Serkis starring, but as you will see they turn in really good performances that added to the film no end.
This is a side of the capital that is hardly ever shown in films and it was interesting to see, definitely an intention of the makers to juxtapose this ragged side of London with the brand spanking new (one shot pans up from the estate to a view of Canary Wharf that's just right next to it). The film's also quite bloody, but also had the audience roaring with laughter at some points! The characters were very well constructed and there are very good free-flowing performances by all the actors (director was previously an actor as well i think, so just let them get on with it)... well worth going to see.