Thanks Dr. Bond. I've put up a few more photos of the upperside which could be more diagnostic than the original posting. I'm not sure, but looking at Braby and the fourth image I've put up, it seems to show better the dark flanking shadow around one of the spots? Kind regards, Roy.
Sorry Suzi, this individual has me stumped. It was definitely one individual, no other butterflies around at the time. Can you have occasional oddball variations? Thanks, Roy.