Much has recently been written about the incumbent Commons Speaker, from (vigorously denied) allegations of bullying to (less vigorously denied) suggestions of Brexit-foxing chicanery. And to call John Bercow a ‘Marmite politician’ is to state the obvious.

A little less obvious is his idiosyncratic style of address — the bizarre collision of a Dickensian clerk with aspirations to eloquence, a stern headmaster out of P. G. Wodehouse,