Theresa May has privately vowed to thwart any attempt by 
Boris Johnson to take the UK out of the EU without a deal, her allies have told The Mail on Sunday.
                                                                                The  disclosure comes as senior party figures told The Mail on Sunday that  Mrs May had voted for ultra-Remainer Rory Stewart in Thursday's ballot  of MPs, which led to a landslide victory for Mr Johnson.
                                                                             Mrs  May, who has vowed to stay on as an MP after she leaves Downing Street  next month, has suggested she would join forces with pro-Remain  Ministers such as Chancellor 
Philip Hammond and Pensions Secretary Amber Rudd to try to stop Mr Johnson from leaving after the October 31 deadline 'Deal or No Deal'.