Sir Keir Starmer’s advisers have very short memories. At PMQs, the Labour leader mocked Liz Truss for visiting America to ‘flog a new book in search of fame and wealth’. He jeered at her suggestion that ‘the deep state’ had sabotaged her career, and he put it to Rishi Sunak that the Tories have become ‘the political wing of the Flat Earth Society.