It is some kind of grass skipper, which you can tell by how the wings are held. Skippers count as butterflies, but they are distinct from 'true butterflies'.
This one was quite unusually tolerant of me today. Wing patterns in enough detail I could probably look up the species... Anyway, let's hope the what's-new chooses to display it.
LATER: Looks at some pictures, but nobody has as much orange on them as this one does... that's all right; means it was special...
One site used the word "specimen" a lot, and many of their pictures were spread-eagle, pinned above cards. It's so sad to see one splayed out like that, since only a corpse does that...
I read somewhere that woodland skipper is a good guess hereabouts, and they do at least have the light fringiness... I don't dare promise anything about markings in general...
