By British Actresses, we mean actresses from any of these countries, England, Scotland, Wales, and North Ireland, whether they are born in the UK or got their citizenship via whatever ways the UK confer citizenship.
Actresses that are originally from elsewhere carry this category but unlike in America where you have Mexican-American, Black Americans, and all those plenty prefixes, this is rare in the UK, so we let British Actresses cover every female actor from the Isle while using Black Actresses or Actors of Color as these stars’ second category.