Copper underwing

Found on the floor in our bedroom this morning.  Sadly deceased, but rather pretty, so I thought it deserved a few minutes of fame before I put it outside for the birds.  

Despite the fact that this is not a particularly rare moth, it took me a good hour to identify it - many of the internet moth sites don't seem to have any photos, and didn't include it in their search.  Once I had a likely identity, it was then possible to confirm this by more specifically searching for that species.

There are two closely related species - Copper underwing (Amphipyra pyramidea) and Svensson's copper underwing (Amphipyra berbera).  Judging from the photos on this website, I think this specimen is the former.

I've added two extra photos, one featuring my fingers to show the top of the underwing, and the other of the underside.