Scum meets Battle Royale in Wilderness, a survival horror Brit flick that tools up with bear traps, crossbow bolts and rabid German Shepherds but forgets to bring brains. Callum (Toby Kebbell) is a violent young offender who's shipped from borstal to a deserted island on an "outward bound" course with his cellmates. When a psycho killer starts slashing throats instead of sentences, it's obvious that the kiddie cons are one step away from the death penalty...

Wilderness kicks off in an unconvincing cardboard-walled prison, then breaks out for "The Island", a former army training camp where bad boys n girls are sent for rehabilitation: think Love Island with tough love. The credibility doesn't improve as the violence starts. Bear traps snap legs and Alsatians nuzzle into chest cavities. Yet the slop bucket gore is more amateurish than nasty (spot the stuffed dog), the shocks penny-pinched into "so what?" yawns.

"ATROCIOUS EDITING AND HAPLESS DIRECTION"

Debut screenwriter Dario Poloni reworks the usual teen horror stereotypes (the jock, the nerd, the cheerleader) into unsavoury types: armed robbers, drug dealers and serial sexual offenders. Shame, then, that his street tuff dialogue sounds as though it was lifted off the last Dizzee Rascal album. Meanwhile, atrocious editing and hapless direction stifle interest long before the preposterous identity of the killer is exposed. Who should do time for this crime? The end credits spell it out in screen high letters (ego, what ego?). This has been: "A Michael J Bassett Film". The Deathwatch director should know better.