I recently went on a business trip with three members of the British ruling classes. The late-night banter over drinks was predictably excellent. Sometimes, though, we had to work. When that happened, my companions showed up unprepared and without notes – and did just fine. No wonder, because their entire education had been a lesson in winging it. They knew that all you need to succeed is to speak well, and that’s what the British ruling classes do: they speak well.

I’m talking about the caste of Britons who attended private school and/or Oxbridge before joining the establishment: senior politicians, civil servants, lawyers, pontificators and the better-dressed sort of banker. It’s the class of Tony Blair, David Cameron, Christopher Hitchens, Anne Robinson and Simon Cowell: the people who speak English better than the rest of the world.

Even the entrance exam for the British establishment chiefly tests the ability to talk without knowledge. Good grades are not enough. You also need to perform in a peculiarly British ritual: the Oxbridge interview. It works like this: you are 17 years old. You are wearing a new suit. You travel to an Oxbridge college for your interview. You find the tutor’s rooms. Perhaps you’re served sherry, which you’ve never seen before. Then you talk. The tutors, sprawled on settees, drawl questions about whatever is keeping them awake. I know an applicant who was asked: “Don’t you think the Piazzetta San Marco in Venice looks like a branch of Barclays bank?” If you speak well, you get handed your entry ticket to the establishment.