By Olivia Wheeler Coronation Street viewers are convinced they’ve figured out school bully Mason Radcliffe’s sinister cobbles link. Only recently on the ITV soap, Sean Tully’s son, Dylan, and schoolmate Mason have been bullying Maria Connor’s son Liam, who contemplated ending his own life in heartbreaking scenes. Things took an even more disturbing turn last week when it was revealed to a shocked Gary and Maria that Mason had even threatened Liam with a knife. After the shock bombshell, Gary and Maria took Liam to the police station, where he reported the incident. Later, the police called at …