They do certainly look like the one pictured on the front page, which is one of the fish from the import in Germany by Aquarium Dietzenbach.
Given the coincidence in time, I think it could point to it being from the same import.
Where about in UK are your fish shop, it does seem they get interesting paros – you also had ornaticuada, didnt you ?
Even if they dont know where the fish come from originally, they must know which importer they get it through ? That is often helpful in some way or other 🙂
I cannot say for sure, but I really think it looks a lot like the other ones, which at that time was identified as p.phoenicurus.