In article , Tumbleweed
writes

I'd say they probably are threatened, certainly as a kid I used to see lots,
very rare these days, I see more tortoiseshells and those brown one's whose
name I forget.

Probably Speckled Woods - food plant is Garlic Mustard, which occupies
the base of the hedgerows round here.

I still find Whites (both Large and Small) fairly common. The other
common butterflies are Small Tortoiseshells and Peacocks. (Peacocks used
to be rare when I was a kid.) Painted Ladies seem to be getting
commoner.
--
Stewart Robert Hinsley