“I’m planning on applying for medicine in the UK”
This concerns me.
I do not know much about medical education in the UK. However, what tiny little bit I know suggests that it might be different than in North America.
Canada and the US have relatively similar medical education systems. You first get a bachelor’s degree, while completing specific premed requirements. This means that you have already spent four years. You can major in anything that you want as long as you complete the premed requirements. Then you take the MCAT test. Then you apply to medical school. Admissions to medical school is tough and the large majority of students who start off as a freshman in university thinking that they are premed never actually go to medical school. If you get accepted to medical school that is another four years. After you get your medical degree (MD) then you start your residency, which is at least three years and can be quite a bit longer for some specialties.
In the US and Canada, admissions to medical school as an international student is quite a bit more difficult than as a native citizen.
I do not know whether medical school is similar in the UK. Also, I do not know whether UK medical schools would recognize your credits if you were to take the prerequisites in the US.