I did my bachelor's and master's in the UK as an international student and during that time I was on a typical student visa. I used to go back home often and so I never spent more than 6 months at a time in the uk (However, as a whole, it was more than 6 months obviously...).
If you have spent 180 days in any country in total since you turned 18, you need a PCC for that country. Even if it was 1 day a week over 20 years, you will need a PCC.
If you have spent 180 days in any country in total since you turned 18, you need a PCC for that country. Even if it was 1 day a week over 20 years, you will need a PCC.