… have been reclassified - https://bsbi.org/download/12507/
British Gentianella anglica and uliginosa are reduced to subspecies (anglica and occidentalis) of Gentianella amarella. Centaurium latifolium is reduced to a variety of Centaurium erythraea, but Centaurium intermedium is recognised at species rank.
(Not that it effects me - all I ever see is Centaurium erythraea.)