A light-coloured moth resting on my window in September.
No interactions present.
LordMuzzy, thanks, the description matches pretty well. I didn't see that before, because the hind wings don't match the diagram in Townsend & Waring. The rear wings must be variable in size, and in fact I can see some like mine here on this site.
Lat/Lng: 51.3, 0.0
OS grid ref: TQ3966