By Nicola Methven The actor playing creepy self-improvement guru Rowan Cunliffe in Coronation Street has told how his parents were sucked in by cults and fake wellness experts in real life. Emrhys Cooper, who has returned to the UK after many years in the US to take up the role in the ITV soap, says his mother’s health has been ruined by the bad advice she received several years ago. And he says that, as a couple, his parents were hoodwinked by a cult which tried to separate them from each other as well as from their cash. Emrhys, who grew up in Totnes, Devon, says his parents Christopher and …