Rishi Sunak deserves credit for the downfall of Nicola Sturgeon

Political leaders are like tribal chiefs and one way of assessing their fortunes is by counting up the number of heads they have accumulated from the toppled leaders of rival tribes.

Tony Blair had the shrunken skulls of John Major, William Hague, Iain Duncan Smith and Michael Howard threaded around his waist when he left the stage.

It undoubtedly enhanced Keir Starmer’s authority when Boris Johnson was brought down, though his part in the immolation of Liz Truss soon afterwards was less obvious.