Small Copper (Lycaena phlaeas)

This spectacular butterfly is probably a female.  It was resting up at Bruaich Jerich bhind Port Charlotte this afternoon.  The food plants are sorrel or docks, and this example is so bright that it had probably only recently emerged. 

I have not previously noticed the purple irridescence on the hind wing of a Small copper but it shows up quite well on the photo here.