Fascinating.
Of the three mentioned May first, Cameron and then Johnson.
Out of a bigger list, Cameron would have come pretty near the bottom, on a par with Alec Douglas Home, but now Boris trumps the lot. Potentially worse that Anthony Eden and Neville Chamberlain, which says a lot. Chamberlain and Eden, I gather, were both considered competent politicians in earlier roles, but being PM and the events dear boy, events, they found themselves with showed them to be out of their depth.
Johnson, although he would like to play the events dear boy card with Covid, was pretty shit as London Mayor, and wasted public money. He was a disgrace as Foreign Secretary, and he is a disgrace now.