Brighton Rock (2010) on Netflix

Whilst Mods and Rockers fight on the Brighton beaches in 1964, Pinkie Brown, member of Spicer's protection racket gang, aims to wipe out his boss and take over the town from rival mobster Colleoni. Prior to the murder of Fred, one of Colleoni's men, naive waitress Rose Wilson had been on the pier and inadvertently photographed with Fred. Pinkie feigns courtship and marries Rose to keep her quiet but Ida, Rose's employer and a friend of Fred, has her suspicions and makes it her business to save Rose from Pinkie's clutches.