Michael Craig is surprisingly effective in this British crime drama. He leads a nasty gang of hoodlums bent own robbing the poorly guarded payroll of a factory. Poorly guarded, that is, until - much to the gang's chagrin - they upgrade the protection to an armoured van. Determined to proceed, though, and after a nervous series of roadwork setbacks, they hit the van, steal the loot and the driver is killed. The widow - "Katie" (a solid performance from Françoise Prévost) is not for giving up, and agreeing with the police that the criminals must have had a man on the inside, she begins an…