I had initially thought this was a White-point, based on size, shape, markings and clear circular white mark (it didn't have a black belly so was a female whatever spp), then I thought Clay. Now, thanks to expert help, I'm settled on White-point (Thanks to Martin Harvey for the comments).
Lots of Common Wainscot
Rustic spp aggregate - picture taken to compare shape with Suspected, caught in Scotland a couple of weeks ago. Epiblema foenella