Cosh Boy

Cosh Boy released in the United States as The Slasher is a 1953 British film noir directed by Lewis Gilbert and starring James Kenney and Joan Collins. It was made at the Riverside Studios in Hammersmith.

Based on an original play by Bruce Walker, the film tells of the exploits of 16yearold delinquent youth Roy Walsh James Kenney and his gang in postWorld War II London.The gang starts off by mugging women. Later, Roy becomes infatuated with Rene, the sister of one of the gang members. Already having a boyfriend, Brian, she rejects Roy, to his fury. Later the gang beat up Brian. Roy menaces Rene, who eventually submits to him. When she informs him that he has made her pregnant, and urges him to marry her, he decides he wants nothing more to do with her. ........

Source: Wikipedia