Theresa May could be forced to stand down if her Brexit deal is defeated in the Commons next week, a Tory former leader has warned, as a cabinet minister broke ranks to suggest the Norway-plus model as a viable “plan B”. Eurosceptic Iain Duncan Smith cautioned against May and her cabinet deciding to “brazen it out”, saying such an approach would be a “disaster”. “How the PM responds after the vote matters more than anything else she has done,” he told the Daily Telegraph (£). “I believe that if the response is, ‘we’ve lost but we will do this all...