Life at the Top (1965)

Joe Lampton thought he had really made it by marrying the boss's daughter in his northern mill town. But he finds he is being sidelined at work and his private life manipulated by his father-in-law. Even so, he ignores an offer of a job in London and keeps away from attractive TV presenter Norah. When he finds his wife is having an affair, he reconsiders on both counts. But can he make it on his own ability down south?