The same thing was done by Harold Macmillan, Conservative Prime Minister in the late 1950s and early 1960s, in 1962 when it was dubbed Night of the Long Knives in comparison with the Nazi purge of 1934.
(Macmillan may or may not have uttered the phrase, “Events, dear boy. Events,” under which I have categorised this post.)
Whatever, the Night of the Long Knives incident offered his Labour opponent Harold Wilson a brilliant line when he talked about this some time later. Wilson said, “I remember the then Prime Minister sacking half his Cabinet — the wrong half, as it turned out.”
I wonder if Ed Miliband can somehow reuse that one.