So that you don’t have to, I have been doing the rounds of City drinks parties asking those in the know who they think a prime minister Boris Johnson would chose as the next governor of the Bank of England. I can now reveal the results: nobody has a clue.

This, of course, is hardly surprising. It is tough enough to predict what Johnson would do about Brexit, let alone stuff lower down the in-tray. Yet if you make some reasonable assumptions, it is possible to sketch out the sort of candidate he might favour to take over from Mark Carney at the end of January.