Test taken: Thinking Skills Assessment (TSA)
Number of interviews: 3
Time between interviews: Morning and afternoon on one day, and the morning of the next day - so a few hours between interviews.
Length of interviews: 30 minutes each
Online interview: No

I had one physical chemistry interview, one inorganic and one organic. Both the inorganic and physical were very maths-based including drawing and interpreting graphs and integration and differentiation. The organic interview the tutor asked what I had already covered and purposefully asked something different - this may sound scary but is actually a very good thing because it means everyone was on a level playing field and it was about showing the way you approach something new. Don't be afraid to discuss a few different approaches you may have even if you're unsure, they're not necessarily expecting a correct answer but more a justified one. I was nervous about the interviews but relaxed into them because I could tell the tutors just wanted to teach me through a way in which I was doing the thinking. The interviews are set up to be like the tutorials you have when you are studying, so actually the atmosphere is more relaxed then you might think and be prepared to ask for and accept some help from the tutors along the way. The questions were like working through a problem sheet and we could do as much jotting down notes and workings as we liked.

I made sure I fully knew and understood all of my year 12 content to feel confident on the subject - the likelihood is you will be asked beyond this but it is good to have a solid grounding. I just used normal revision techniques such as rewriting and notes from memory and then correcting to do this. I practised talking about chemistry out loud by explaining topics to friends in revision sessions (sometimes up at a whiteboard in a classroom) and discussing chemistry topics with my parents (they had not studied any chemistry so it was good to practice having to fully explain myself). Although this may seem simple it is very helpful to get used to talking about your subject and if you can get the people you are discussing with to ask you questions about what you have said that is even more useful, your responses shouldn't be prepared but thought about at the time of asking.

I completed practice papers from the TSA website under timed conditions. 

Do not worry about what you already know compared to others, it's all about how you take on new information! Take your time with questions and do all your thinking out loud so the tutor can see the thought process you are going through. Do not be afraid of the tutors, they really do want you to do well and are hoping to teach you and work with you so don't overthink how you should be behaving around them, they want to see the real you and the way you work. There's also no need to be worried about what you are wearing or anything like that - jeans are fine but so is a suit, whatever you're most comfortable in. It sounds strange but try to enjoy the interviews, you are in an amazing place and meeting lots of like-minded people - it may relax you to enjoy the position you are in.