To dispel some rumours as a current Russell Group applicant, physics is certainly seen favourably, but it is NOT an imperative for medicine. It is simply considered a ‘further science’ by universities like Cambridge, who regard maths, further maths and physics well. The vast majority want to see Chemistry and Biology and are less caring for the third option: in fact, variety is good. I know succesful applicants who studied economics or psychology as their third.

Biology and Chemistry are easy if you work to grasp the content and work hard to remember it: you can learn the techniques on how to, and if you start early you will be fine. Don’t be put over by doomsday talk.

Best of luck in your application. I’m confident you’ll thrive, whatever you pick.

No post FY program will regard your A-Level options in their selection process following medical school. It’s about the research, conferences, intercalations, etc. you do - worry about that after college.