Green Veined White Butterfly

Very pleasant walk along the railway and river this afternoon in warm sun.
Saw, amongst other things, a heron, a kingfisher, goldfinches and a red admiral. Where are they? I hear you ask - Well, if only I could move as quickly as they can, I could have provided you with an answer.
But we will have to settle for this rather attractive Green Veined butterfly and be thankful for it :)))