Hi Gibster,
I think youve made a positive id. And can confirm locality as an oak wood. Many thanks for your advice. Never seen one of these before. A striking butterfly

I am unable to identify this butterfly seen in north east Wales this weekend. I am not a butterfly expert, I just know ive never seen this one before. I almost trod on it, the butterfly is settled on a rock on the ground. The striking thing is the blue across the wing. I wouldnt say this is a big bu...