Mike Young was Nathan and Jamie's father. He originally lived in Ireland with Nathan's mum, Louise, but after he cheated on her with Jamie's mum, he eventually walked out on them when Nathan was about six. Based on past experience, (or so he says), Nathan perceives him to be a bad father.
He was called by Beverly to pay for the charges against Nathan after he tried to steal a pick n' mix. However, because of their troubled relationship, Nathan proudly encourages Beverly to call the police.