Isn't there a state school society there or something? Either way, I always find these kind of threads weird. The proportion of public schoolers there is something like 35%, the same as Durham - yet people on TSR act like these places are the refreshments tent at Guards Polo Club. Even Royal Agri and the Courthald are around the 40% mark - state schoolers vastly outnumber at these places.
The other thing to bear in mind is the type of course - things like Ancient History, Classics, Music, Literature and Modern Languages are going to be chock full of public schoolgirls- subjects like Engineering, Maths, Medicine, Economics, Law are going to be like any other place.
If someone is walking around seeing toffs everywhere, it's probably because you're looking for them - and because it's a fairly good university for sports which will make them more visible. They'll be everywhere in their stash for Rugby, Rowing, Polo, Hockey, Lacrosse, Shooting and Sailing and because they are dressed as such (or carrying hockey sticks / polo mallets they'll be identifiable as students)- on the other hand there are almost certainly relatively fewer public schoolkids in E-sports, Hide & Seek (see above), Board Games, Bitcoin Soc etc - but you are by definition not going to see them around as much because they'll be indoors playing their games and I expect that having stash for Hide & Seek society would defeat the object.