Struggling with this one - wing length 16 mm. Thought at first maybe Marbled Minor agg but it looked larger and the kidney marks seem to be outlined orange with small white dots next to it.
Maybe Common Rustic agg ???
This blog has been set up so local people can find out what is going on in the world of Moths, Butterflys and dragonflies in Calderdale.If you have any ID problems put up your photo's and someone will try and help you to id it.