I studied in the 1990s. I recall universities like bath and imperial needed AAB or ABB for science or engineering courses. I was checking this today for by DD in a years time and see they now need AAA on average...
Similarly requirements to do maths A levels used to be C in maths GCSE. It is not a 7 minimum... equivalent to an A at gcse...
What's going on. How do average folks get to university?