Spotted Magpie.
(Phlyctaenia coronata)

Outside the moth trap, on the cover, ready to fly away.

Information:
This one was not in my book of all the UK macro-moths and so there was a pause before I discovered it was a Phlyctaenia coronata, and from that the English name. In America it has the common name 'Crowned Phlyctaenia' which echoes the Latin 'coronata'. If you look at the fore-wing tip you will see a pair of zig-zags that are, probably, the 'crown' to which the name refers. This 'Crown' mark is, in any event, a clear diagnostic aid to identifying the moth which, otherwise, looks a bit like a sepia'd negative version of a Small Magpie without the prominent yellow markings !
I don't know their flight times or habitat preferences ... yet.