Brian Cox refuses to accept last-minute script changes from writers on hit show Succession if they come in after his bedtime, one of his co-stars has revealed.Kieran Culkin, who plays the son of Cox’s character Logan Roy in the series, said the Dundee-born star has told bosses he will not perform rewrites if they are sent to him after 10.30pm.He said veteran actor Cox has spent six decades following the same strict routine of preparing for a scene the night before, which meant he was unaware of