What percentage of medical students take a gap year before uni?

Asking out of curiosity

I can't tell you that - in fact I'm not sure there is any body that holds that data.

What I can tell you is that in 2018 out of 20,730 applicants, 2,480 had applied previously. This proportion has been steadily decreasing since 2015, when 3710 applicants out of 20,390 were re-applicants

https://www.ucas.com/file/130741/download?token=g_2adVK0

You may be interested to know though that between FY2 and ST1 i.e. between years 2 and 3 as a doctor, its a natural career break and more than half of doctors take a gap year.

Do you know if the statistics for those who reapplied to medicine contain individuals who only applied their first application after their gap year?

And this may be silly asking but when you say doctors take a gap year e.g. after year 2, would they return after the gap year as year 3 or year 4 students?