Silver Y

In London all day, at exhibition and a Prom concert. Suddenly thought on approaching the house this evening that I'd have to rush out and find a blip in the fading light. However, what should be on the house wall, right next to the door, but this obliging Silver Y moth. I'm used to seeing these in some numbers during the day at the nature reserve, but have recently seen them in the garden at dusk as well. The white 'Y' mark that gives it its name is very clear here.