Ten years ago, Robert Jenrick was a bland centrist solicitor, exactly the sort of safe candidate who the Conservative Party didn’t have to worry about. So how did he become such a controversialist? As Kemi Badenoch sacks the shadow justice minister for plotting against her, political editor David Maddox tracks his journey to see if he really is an ideological convert or just an extreme opportunist I f one politician represents the Trumpification of British politics, then it is not Nigel Farage