Brian Cox says his parenting skills are nothing like his ruthless on-screen character.The Dundee-born actor plays media mogul Logan Roy – who lets his children fight for control of his empire – in Succession.Each one of them seems dependent on him and almost self-destruct trying to win his approval.But dad-of-four Brian, 74, has said that he doesn’t overly protect his own children and feels they should be “allowed to fail”.Speaking on David Tennant Does A Podcast With…, he said: “My thing is