First half: pretty good movie. British film, very violent and emotionally very dry but that's an intentional stylistic choice and it works well in this case. The main character watched his parents gunned down due to gang violence when he was a boy. Orphaned and homeless, he grew up to become an outsider. No real emotions, no real ambitions, just doing what he had to do to survive. Then he became a hitman for the same gang that killed his parents. From the narration style, it's a sort of first-hand look inside the mind of a sociopath. Pretty cool way to tell a story I think.
But then halfway through, they've been building up the tension around the gang boss... and it turns out to be Steve Guttenberg (from Cocoon, Police Academy, and Single Santa Seeking Mrs. Claus) in a long blonde surfer wig and purple hippie sunglasses. He's the big villain of the film. And he plays it as a sort of care-free off-the-wall kind of character. It just completely ruined the movie for me. He's just too goofy to play the villain in a movie like this. While he did provide some color to an otherwise very drab and dark film, I feel like it would have been a better movie if they had gone with someone who would have approached the role with a little more gravitas and reverence. It went from being "The Godfather" to "Weekend at Bernies" and the mismatch was just terrible to watch.
But that said, aside from the big villain being cast and played so ridiculously, it was an interesting movie if you're into the London underworld or gang/hitman movies in general.