By Alan Johnson & Joseph Wilkes Bradley Walsh had an ITV first during Wednesday’s episode of The Chase as he met a charming contestant. Mark ‘The Beast’ Labbett took on Alex, Nicky, Michelle and Joe, a 78 year old Chelsea pensioner from London who was wearing his full uniform and several medals. After correctly answering four questions in his cash builder round, Joe successfully challenged Mark, banking £4,000 for the final chase. Following his performance, host Bradley Walsh gave him a high-five, confessing: “I’ve never done this before.” Unfortunately for Joe, Mark easily dismissed him along…