Laughably described as “the world’s leading climate scientist”, this absurd figure, with his PhD in the economics of railway engineering from an obscure US university, should never have been given the job in the first place. As a vegetarian, he jetted round the world exhorting everyone else to save the planet by giving up air travel and meat. Thanks to the prestige of his position, his institute was showered with millions of dollars by international institutions, from global banks to Yale University (not to mention £10 million from British taxpayers).