@MeetMeOnTheCorner I have no issue with you making points that are backed up by figures. What I have challenged is the insulting comments you have made, as generalisations, about northerners as though everyone who lives in one area of the country thinks alike. The OP asked a question - I don't think she has said anywhere "We don’t want to mix with some dc we see as privileged. We don’t want to know them". Even now, you're making insulting remarks about northerners not wanting to go south or out of their comfort zone - I'm sorry but you're talking rubbish.
I'm not going to provide a link but my DC's (northern) school publishes leavers' destinations (I'm not sure if LAs actually publish that type of data) - for 2024, 53 out of 147 went to universities south of Birmingham. In 2023, it was 76 pupils out of 149. So roughly between a third and a half of pupils. Clearly they're not all electing for "northern" unis.
I can only speak for my (now at uni) older children and their friends - they applied nationally to universities that seemed to offer the most well regarded courses for their particular interest, narrowed down to whether they liked the vibe of a city university or a campus, which ones were within reach grade-wise, which unis had a good reputation for placements etc. Then they did the open days, and made their choices accordingly, then offer holder days. Geography did come into it - how far away it was from home, how easy the travel was. Whether the uni fitted into a category of "north" or "south" never crossed their minds nor did the likely make up of the cohort between private / state educated students. The reason I'm on this thread is that my Yr 12 child went to a university fair recently and spoke to a representative from Exeter as she'd looked at league tables and its very well regarded for the course she wants, the Exeter student was apparently really engaging, was doing the course she wants to do, my DC came home buzzing about it and we're therefore off to the open day. She had absolutely no idea where it is geographically or the make up of students.
I lived in London for years - most of my peers left uni (wherever that was) and moved to London - some stayed, some relocated elsewhere after a few years. Its ridiculous to say "the south is despised". My sibling lives there still (30 years since uni). My (uni) DC will move to London at some point, probably go further afield too.