This week’s nadir came with the prime minister’s wholesale importing of the language of the alt-right into his performance at the despatch box: over and again he spoke of the ‘Surrender Act’ passed before prorogation; his attorney general, in the warm-up slot, bellowed that this ‘dead Parliament’ had forfeited its ‘moral right’ to sit. When reminded that the language of ‘surrender’ and ‘treachery’ was associated with the murder of Jo Cox, Johnson gave little more than a sneer. It was hard to watch the malevolent pantomime without thinking of the earnest anxiety of some of the Labour Conference debates, or the distraught and unvarnished message delivered by Greta Thunberg to the UN two days earlier: ‘You are failing us.’