An analysis of leavers' destinations from leading private schools shows a clear tendency to favour a select few, mainly Russell Group, universities. The university with the highest percentage of private school students in 2022 was (some might say unsurprisingly) Durham with 38.4%. Exeter was in 5th place with 34.5%. Oxford was 8th and Cambridge 10th.
There is a perception among some private school pupils and their parents that Oxford and Cambridge actively discriminate against applicants from private schools (note, I said a perception) and therefore they look elsewhere. The pattern reveals that, with the exception of the four premier London institutions and Oxbridge, private school pupils tend to prefer universities that are located away from large, socially and ethnically diverse cities. There is also an in-house knowledge that others in their own circle tend to congregate in particular institutions: a "birds of a feather" effect. On top of that, Exeter is well regarded, regularly featuring in the top 20 or so of the domestic rankings.