Although confirming what I’ve kinda always known, HEFCE published a report showing that state school children graduate with better degree classifications than their private schooled peers, despite being accepted to university with the same A level grades. State school kids are more likely to get firsts or 2:1’s than those from private schools.
Thing is, this makes sense. If you go to a state school, because of the funding problems, you basically teach yourself, so you acquire independent learning skills, so crucial at university, early on. A kind of sink or swim thing. But kids from private school are use to having their hand held and the idea of being sat in a closet learning from a book is their conception of going to the bog.
That being said, from personal experience, the kids who do head and shoulders above everyone else seem to be those coming from CofE schools. There were a tonne of them in my day, and although there was nothing usually intellectually outstanding about them, they did have quite a broad education and they knew the assessment system inside and out.