Nice pic, Vawn

The recent warm sunshine has brought the Spring species out in force, with Holly Blues now plentiful in my Oxon garden.
The early flight period (of the first brood), silvery-blue colour, and chequered fringes all mark this out as a Holly Blue. I think that, because the underside is in shadow, the pale edges to the dark spots are more noticeable than usual. In sun, the underside looks almost silver.
Mike