Brian Stone
A Stone chatting
Hi Brian, I did wonder about p.aurata . Sorry, no other photos that'll help. What should I have looked for? It looked far more purple that p.aurata which I've seen in my garden. But I know that doesn't necessarily mean it's purpuralis. Hmmmmm .... not sure now.
Look for yellow on the basal part of the hindwing. Both have the median yellow line you can see in your pic but only purpuralis has significant yellow at the base. This can be seen from the underside as well as from above.


