Test (1hr), 2x interviews (30 mins)
Discussing experiments, graph sketching, molecule drawing.
School prep sessions going over previous questions.
Don't over-analyse your answers during or after, getting something wrong isn't always bad.
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.
A 1 hour
Chemistry and maths problems, hypothetical experimental designs, discussion. It was very informal and the interviewers tried to make me feel as relaxed as possible. They made allowances for nerves and gave me time to answer but prompted me with help if I needed it.
Once I got over initial nerves, I strangely quite enjoyed the second interview. I had to sketch a couple of graphs, some chemical molecules, discuss an experiment that involved different organisms interacting, and other things.
Don't over analyse your answers or the questions when you come out. Getting things wrong doesn't mean the interview went badly.