Many thanks David. I think I was too hasty. I should have thought of that before. Brian.

Hello David. Thanks for the reply. I am puzzled because all the books I have show the attached picture which appears different. Do you suppose the butterfly in my original post appeared different because the wings were not fully open?

Hello. Could anyone please tell what the attached butterfly is?https://www.ukbutterflies.co.uk/~ukbutt ... &id=240869