Johnson's memoir has been long-awaited: in January last year, his register of interests revealed he had received a £510,000 advance, well above the £7,674 his successor Liz Truss received for her book 10 Years To Save The West.

Unleashed’ is the product of his ‘split personality’ and reads like ‘Billy Bunter let loose in Westminster’, writes former home secretary

As a "chastened" Tory Party convened for its conference this week, and the wider country remained mired in the gloom that has enveloped it since Keir Starmer's "loveless victory", excerpts from Boris Johnson's soon-to-be-released memoir provided a "much-needed tonic", said the Daily Mail (which had acquired the serialisation rights).