At the risk of giving the Tories another bout of apoplexy, there are some interesting historical precedents surrounding the election of very young House of Commons Speakers in terms of what happened in their subsequent careers.
The year 1789 is chiefly remembered for being the year of the French Revolution. But it was also the year the Commons elected two thirty-something Speakers who both went on to occupy Number 10 Downing Street.
The first of these was William Grenville, who was elected Speaker at the ripe old age of 30 and held the office only very briefly before quitting to become Home Secretary.
In his place was elected the 32-year-old Henry Addington, who remained in the Chair until 1801 when he suddenly found himself elevated to the Premiership in place of his childhood friend Pitt the Younger, who declared that Addington was the only successor he could countenance.
In the meantime, Grenville had gone into opposition, along with his close ally Charles James Fox. But in 1806, he was summoned by King George III to head up what was termed the Ministry of All Talents, though unfortunately for him, it only lasted a year.
Even further back, in 1715, one Spencer Compton was elected to the Commons chair at the age of 42 - four years younger than John Bercow is now. He served as Speaker for 12 years until 1727, when he was elevated to the House of Lords as the 1st Earl of Wilmington. In 1742, he succeeded Sir Robert Walpole as Prime Minister.
Bercow has said he will do nine years in the Chair, effectively two full Parliaments plus the toe-end of this one. That will make him 55 when he stands down - younger than Gordon Brown was when he became Prime Minister in 2007.
The only remaining question is: If Bercow did decide to pursue a post-Speakership career, would it be as a Tory or a Labour MP?