By Charlotte Tutton Coronation Street airs two big returns to the show next week, leaving residents surprised on the ITV soap. New spoilers for next week confirm one family sees the comeback of two relatives, including one who was last seen two years ago. Linda, the grandmother of Joseph Brown, makes her arrival known as she clashes with Joseph’s stepmother Gemma Winter. But there’s some good news for Gemma by the end of the week, as her mother Bernie Winter rejoins the show, after her own recent departure. Just weeks after fears she had left for good, Bernie returns ahead of a sad death on th…