Two photos from Brian sent in telling us:
We went to Alners Gorse on 25/07/2021, quite late to try and catch the Purple Hairstreak when they are more settled, hoping to get an upper side shot, but although we saw quite a lot of them I could not get an upper side photo. I have found in the past that late afternoon can be easier for the photos. We did see one very briefly open its wings and saw a flash of purple, but it closed them immediately. Then one perched high up with wings open – way out of reach, but I did get a silhouette picture.