It’s certainly an interesting wee fact but I don’t think it says anything about whether the UK should be considered more or less meritocratic. I think it’s a fig leaf where we get to pretend we are a super progressive country that is smashing its class system, while doing very little to that effect.

To be clear - I don’t care where David Cameron, Theresa May, Boris et al send their kids to school. I care that such schools exist effectively to officially stamp you as a member of the upper class.

Edit: I hope this doesn’t sound like I’m annoyed with you or the original commenter! I have some strong feelings about this but I am aware that you didn’t create this system, that you are not standing up for it or trying to protect it. We’re just having a discussion and as you say it really deserves an entire book