… seems to have shrunk down to the goal of clinging to his office for one more month, so that he will have been prime minister longer than his maudite predecessor. It’s hard to imagine why else he’d be putting on such an embarrassing display. It seems unlikely, even if the Conservative parliamentary party need to dismantle No. 10 Downing Street and carry Johnson out mid-tantrum.
On the other hand, looking at this excellent Wikipedia page “List of prime ministers of the United Kingdom by length of tenure” see that he only needs to hold out for two more days, to surpass the tenure of Neville Chamberlain.