As I had my Interview from Malaysia, I had one interviewer (a physicist) from Murray Edwards for a Chem Eng (via NatSci) interview in Emma. I had to take the Thinking Skills Assessment (TSA) on the Saturday before (this is now changed to a different test) and had my only interview on Sunday. The interview was 30 minutes, with only 1 interviewer.

The interview started out with my explaining a project I did which I mentioned in my personal statement, which then nicely led to my first physics question on physics. I then had a chemistry question about combustion, followed by a short Q&A session. At the end, since we had time, we did a very simple maths graph (which took 2 minutes).

It was very much a more-difficult A-Level style question; imagine if someone took a topic, and asked you the "A* question" (which is normally at the end of the question) and stretched said "A* question" as far as possible. Oddly, for both questions I wasn't given much new information to digest, but was instead tested on current topics I had already known. This may be because of the limited time we had during the interviews conducted overseas.

If you are an international student, chances are there's an OxBridge society for students from your country. If you ask nicely, they can do mock interviews for you, which I didn't do but would've found really helpful. My A-Level college did, however, provided me a mock interview and personal statement counselling. For the TSA, I was told that it was very similar to the AS Thinking Skills multiple choice paper for the CIE board, and used that for practise.

Voice out everything. Every thought, every detail, every small glimpse that's relevant to the question, lay it out there so they know that you're thinking of something. If they don't know you're stuck or how you're stumped, they can't help you to gauge your response to new information/teachability!