What will Oxbridge interviewers want to talk to me about?

Oxbridge admissions tutors see the interview as an opportunity for you to demonstrate your passion for and knowledge about your subject. There are several different interview formats, depending on the subject you are applying for. For the sciences, you may be given a problem at the beginning and asked to solve it or discuss it with your interviewer. For the arts, you may be given a text or a quote and asked to give your own opinion. You can expect the interviewer to have thoroughly read your personal statement too, so be ready to answer questions on any material you may have referenced in there.

The interviewers do not expect you to have perfect knowledge of your subject field, and it's not wrong to admit you don't know something! Rather, they want to see the potential in your ability to critically discuss difficult questions, and whether you are truly passionate about your subject. So relax, read up on the bits of your subject that interest you the most and just be yourself in interview.