Boris Johnson once specialised in defying political gravity. He was twice elected mayor of London, a Labour city. Under his leadership, at the 2019 general election the Conservatives won the highest share of the vote for any party since 1979.
He once aspired to a decade as prime minister but has since fallen to Earth. Having endured the indignity of being forced out of office by his own MPs after three years as prime minister, he has now chosen to leave parliament in disgrace.