Hi there 😊,
Although I have not done a Uni of Liverpool interview, I am a current pharmacy student and have done past interviews so I can hopefully help.
So on the University of Liverpool website, it lists the Standards of Pharmacy Professional so have a look at that on the GPhC website. Make sure you're able to give some real life examples of how you have demonstrated these examples. I really liked the STAR method to format my answer and can help make sure you mention all the points. With majority of pharmacy interview, be sure to have some sort of answer for "why pharmacy", "why at Liverpool", "why not x instead" etc. It can also help you consolidate the most important points you want to mention.
Have a look on The Student Room chats which have an interview prep which is a great summary of things to have a look at.I would also say have fun and be yourself at the interview. The interviewers aren't there to trick you but to assess you as an individual and looking at your values and qualities. Also I found that in the interview invitation usually has a lot of information about the interview format.
Best of luck for your interview!
University of Bath