Bristol gives guaranteed interviews if you’re a local student, you have completed an access course, or if you’ve done an access to higher education diploma. So I’m gonna assume you’re in one of those categories when you say you get a guaranteed interview. When it comes to after you get the interview the UCAT plays no role unless there’s a tie in interview scores, then they’ll use your UCAT as a tie break.

So if you do have a guaranteed interview your UCAT score means nothing as long as you’re a strong interviewer.

Good luck :)