A long time ago I applied to Cambridge. I had no interview prep, no practice for my STEP exams. I didn’t even have an A level teacher who had studied that subject to A level themselves. I did get an offer, but predictably did not achieve the grades. I went to York. (Incidentally Coleoptera your DT2 may like York very much as it is a compact campus with colleges. I think History is meant to be very good there too.)
Anyway, fast forward lots of years and I am sooo proud of my DD getting the place she (not me) has dreamed of for years. She used to want to study Maths, but since being at a very good state sixth form college with excellent teaching she has changed direction. They did have excellent preparation for Oxbridge with one or two practice interviews and advice sessions for personal statements etc and an overnight trip to Cambridge with workshops thrown in. If she had stayed at her previous GCSE school (was in Special Measures) the picture may have been different. But she may also have been flagged for being at an underachieving school too in that case, and her GCSE results and self taught early A level results seen in that context.
I think it must be hard, if you have have decided on an expensive private education, often at great personal sacrifice, to feel that allowances are made for state school pupils. However, the education received at a private school will still have been better in the main and the chances of a successful application to Oxbridge from a private school are, I suspect, still much higher this year even if there is a (in my opinion necessary) move to make things a little fairer.
Another big difference this year is the lack of AS results in England. Lots of A*s at GCSE do not necessarily indicate a huge academic ability. There is a big difference in A level content. Also, someone who is brilliant at Maths, for example, may have poor results in some subjects, but be a perfect Cambridge Trinity applicant. Somebody who lives and breathes History may not be good at Science, but that doesn’t matter. My brother, who was in the ‘remedial’ class in school, is a Dr of engineering.
Hopefully Oxford and Cambridge, with all the variations of interviewers, colleges and subjects etc, do get it right most of the time, but they are bound to miss out on some really brilliant students sometimes, and by the sound of it there are some we have heard about in this thread. They are bound to get it wrong sometimes. That doesn’t mean the children have failed at all and they will do very well elsewhere.
I’m sorry if this comes across as at all ranty.
Good luck to all the applicants here for all the universities. I am particularly thinking of those with STEP to get through too!