Where was the Princess Switch film series filmed?

The Princess Switch film series has 2 titles (2018 to 2021). Wikidata records no filming place for them; Wikipedia names Carei, South Queensferry, Hopetoun House, Károlyi Mansion, Carei, Gosford House and 2 more places. Every place links to its source.

The productions, in order

Named in Wikipedia's own articles

Places named only in the titles’ Wikipedia articles.