3x 25-30 min interviews, over several days
All interviews: maths and physics problems
Past papers, revising school syllabus, researching unknown topics from past papers
Mock interviews; revise PAT content and school syllabus
Remember this advice isn't official. There is no guarantee it will reflect your experience because university applications can change between years. Check the official Cambridge and Oxford websites for more accurate information on this year's application format and the required tests.
Also, someone else's experience may not reflect your own. Most interviews are more like conversations than tests and like, any conversation, they are quite interactive.
Test taken:
Number of interviews: 3
Skype interview: Yes
Spread: Gap of a few days after first interview, then second and third interviews on consecutive days.
Length of interviews: 30 minutes each
In each interview I was asked a series of maths and physics problems, with follow up questions on my reasoning.
I did past papers and researched any topics I didn't know about. I also revised from my school work.
I did a couple of