Wrt to Oxford interview workshops, my daughter has found out today that she has been assigned one (with an alternative college to the one she applied to, obviously).
She found out about the interviews from her school. It wasn't through previous outreach, as she has only ever taken part in Cambridge activities, rather than Oxford. It also doesn't appear to be because of the area we live in, as we are in a very definitely middle class area. It's also not a struggling sixth form, unlike her previous school (in a different area) which was in special measures throughout her GCSE's and she practically had to teach herself several of her subjects. I really hope that any Oxbridge applicants still in that school are given every piece of external help going, as they certainly deserve it. I really don't think that people who have only ever experienced decent, or even average, schools have any understanding of how bad it can get.