Professor Tim Bale from Queen Mary looks back at Harold Macmillan's time as Prime Minister, and his infamous string of cabinet sackings dubbed The Night of the Long Knives: "To understand why Macmillan’s move earned such a sobriquet, one has to imagine Boris Johnson getting rid of the following in one fell swoop (for once, the cliché is entirely appropriate): Dominic Raab, Nadhim Zahawi, Ben Wallace, Alister Jack, Michael Gove, Oliver Dowden, and, of course, Rishi Sunak."
This was covered in the The Daily Telegraph (PDF available on request)