Both are a very special subspecies, especially the great ormes head ones, it’s a protected area now and impossible to get. Anyways, so many lcaenidae look the same but are totally different. Just looking the same doesnt say so much.
The Prees Heath population is not a subspecies! The colony is now protected within a nature reserve. The example from Great Ormes Head is the endemic British caernensis with especially blue females. You can see some other nice examples here