beanlet that's pretty immature. If you set yourself up as a high quality source of info then at least get it right. And if you don't, then at least have the grace not to insult either me just because I queried what you said or the achievements of very clever, hardworking, super-nice kids that you don't know. All the kids I'm talking about were state educated, so yeah, maybe an apology?
Quite amusing though since OP's DD is privately educated so are you implying she's below average? Clearly you are. Well that definitely wouldn't work for Oxbridge. Mixed messages there.
OP, the current Oxford system feeds the GSCE grades into a computer, adjusts them according to school, adds in the BMAT score and sends out a list of invites for interview. With cases on the cusp an actual human being looks at their form to see if there are any outstanding features which would warrant an interview.
Cambridge does it differently. beanlet's advice is fine for Cambridge but not for Oxford and it is useful to distinguish the two universities when the procedure can make a real difference as it might well do for your DD.
beanlet, in case you haven't yet fucked right off, you're also talking bullshit about how many kids get 11A's. If every above average kid going to private school got 11A then the national figures would look very different. Check them out and do the maths before you do down every private school kid with less than 11 A*'s. You can't generalise from SPGS or similar because each and every kid at schools like that are way, way above average to begin with.
I hope that you're not a tutor yourself because you seem pretty unopen to challenge.