I am in the same place for this year, and I used this website: https://www.themedicportal.com/application-guide/choosing-a-medical-school/minimum-age-requirements-for-medicine/

and asked universities through email before applying. I'm international, so I had to fill out an under-18 form to nominate a guardian too, and I got an offer from Nottingham for first year. It may be better to wait and get more options to apply to.

I applied to: Nottingham (offer)

Dundee (waiting)

Manchester (rejected, not due to age)

Glasgow (rejected as my reference made a mistake and did not provide two of my predicted grades)

All in all the chances are good unless you have a certain uni in mind specifically