I understand what posters like
Hiptight and
Wombat are saying but still think this seems disgracefully unfair.
The way it has been done has taken away any autonomy an individual student had over their own outcomes.
It seems like there was nothing individuals could do to improve or mess up their results in the months running up to exams - it would all be determined by an alogorithm based on demographic, quality of school and performance of other students, past and present. Nothing about their results would be based on their own motivation, hard work and progress.
An algorithm might know that in a given school, a cohort of 10 English Lit students is likely to get 3 As , 3 Bs, 2 Cs and 2Ds. It doesn't know which individual students are going to work like crazy for 3 months, which are going to get nervous, which are going to receive a university offer they can achieve in their sleep and therefore slack off etc. Teachers know the pupils and have seen their recent work. Unless, as a collective group, the given grades looked unrealistic, they should have been accepted as a professional judgement. Most secondary teachers I know spent a huge amount of time and effort making sure their predictions were statistically realistic, not emotive.