|Chestnut, Conistra vaccinii, left and Dark Chestnut, Conistra ligula, right. In my garden in Hayes on 4 February 2013.|
These two are typical winter moths, that come out on warmer nights to look for berries dripping juice. There's plenty of ivy nearby and that is probably what brings them here.
The Chestnut is lighter in colour and has more rounded wingtips. The Dark Chestnut is also glossier, and has light flecks on the leading edges of its wings. But they are not easy to tell apart, specially if you are only looking at one specimen.