Hello, @imaginayto and @MatildaJayne .
Admissions tutors tend to be familiar with UCAS.
Actually it is well known that pg’s from schools sending small percentages of students to university are the ones that are low relative to pupil outcomes. (Idon’t have time to search for a link, but seem to recall that Cambridge has done some of the research.) This is a grave disservice and a difficult one for the sector to address. My concern is that the letters from these schools may also be less supportive. The consistency in this is not what anyone would wish for.
However this damping of pg’s does not make these schools the source of concern. Quite the opposite. The schools that give us pause, @imaginayto, are almost exclusively middle class schools that tell parents and pupils what they want to hear but do not have a reputation for delivering results. Bad days are fairly uniformly distributed (except amongst struggling schools, not the ones under discussion) and do not affect reputations.
Thanks, @MatildaJayne , I believe every academic up and down the land is trained in GDPR. Any of us has a legal right to much of our data after the fact. That is quite a different thing from running it by us before submitting it.
At another level, many academics simply will not write letters of reference for competitive postgraduate study, no matter how glowing, unless the student waives access, because non-waived letters are not taken as seriously and are sometimes regarded as a yellow (not, I think, red) flag. And I simply cannot imagine anyone on the academic job market declining to waive access.