http://i.guim.co.uk/img/media/88e5caf03f7b1ae07c069fafd0c097f551e1a3d0/0_273_3647_2189/master/3647.jpg?w=620&q=20&auto=format&usm=12&fit=max&dpr=2&s=4a131db60840c8b9a34dc17c1de6c150 Downing Street was working on a “save Dave” plan, and “peace talks” had been held between senior aides of the prime minister and the London mayor. http://www.theguardian.com/politics/2016/apr/10/david-cameron-eu-referendum-boris-johnson-michael-gove