The Westminster rumour mill is in overdrive today on the question of whether Rishi Sunak will be Boris Johnson’s successor in No. 10. It’s not that there’s a job vacancy. Instead, the first ConservativeHome poll on who Tory members would like to be the party’s next leader has put Sunak out on top, with International Trade secretary Liz Truss in second and Cabinet Office minister Penny Mordaunt a close third.