The Slasher aka Cosh Boy

A gang of teenage delinquents, led by Roy (James Kenney, Captain Horatio Hornblower R.N.), is earning money by mugging women on the streets of London. The boys are making substantial profits, until the police catch up with them. At their hearing, the magistrate passes a fairly lenient sentence with the suggestion that they join a youth club and reform their ways. But while there, the delinquents use the building as a base for their growing operation, intimidating other members of the club, increasing their numbers and slowly getting in over their heads. Co-starring screen and television legend Joan Collins (The Bitch and TV’s Dynasty) and directed by James Bond veteran Lewis Gilbert (You Only Live Twice, The Spy Who Loved Me).