For a British prime minister in modern times, things have never gone so wrong, so fast.

Less than a month in No. 10 Downing Street, Liz Truss and her team have already adopted an us-against-the-world mentality, after a brutal reaction to her economic plans triggered the humiliation of a central bank rescue.

That’s turned what should have been a celebration at her ruling Conservative Party’s annual conference in Birmingham into a moment of peril. Almost unthinkably, some Tory MPs are already privately discussing a leadership change, just weeks after they ousted Truss’s predecessor, Boris Johnson.