Red-necked Footman.
(Atolmis rubricollis)

In one of the darker corners of the moth trap I noticed a flash of brightest orange. A long search later yielded the name: a Red-necked Footman!

Information:
A uniform all-over velvety black with a startlingly bright red collar, but the collar colour fades over time - as with the one that visited me. They are quite distinctive with their long, thin 'footman' shape. They can be seen flying June-July in the canopy of oak or conifer woods and plantations or at rest on bushes in the same areas. Their Fore-wing length is 15-18mm and they are resident in most parts of Britain with pockets of higher density in South Wales and South Western England.