Shank (15)

Boil-in-a-bag dystopia. This thriller, set in the Broken Britain of 2015, envisages a lawless London crippled by food shortages and overrun by teenage gangs.

Junior (Kedar Williams-Stirling) is bent on avenging the murder of his brother, despite the latter's belief in the sanctity of life, and rallies his gang of "bruvvas" in preparation for a big rumble. The reverberant bass-heavy score, which director Mo Ali lays on the movie, is so loud that you can barely comprehend the gangster patois flying back and forth, though given the bits you can understand ("Gotta be on disting, cos if you ain't then youz a victim") that might be just as well. The swearing, fighting and chasing that constitute the gang's routine alternates with a notable weakness for sentimentality, as always the other side of the macho coin. It's headache-inducing stuff, poorly acted and lumpenly plotted: a terrible advert for British film-making.