E. extimalis - http://www.flickr.com/photos/qwertyqwertyqwerty/
Evergestis extimalis is a species of moth in the Crambidae family.
This species is very local in Britain, with numbers often increased by immigrant moths, but is always a rarity to get. Rather similar to the Garden Pebble, this species is yellow with darker dotted crosslines and a dark patch at the termen.