One of the few noteworthy butterflies I saw recently and host managed to photograph up close as it was busy feeding on the Buddleja flowers.

Silver-washed fritillary (Argynnis paphia), male.
They love bramble flowers. The larvae feed on violets but we've never seen one. The butterflies are quite big, up to 7cm wingspan.
https://en.wikipedia.org/wiki/Silver-washed_fritillary