A moth that came to a light trap on Keston Common, near the bog.
No interactions present.
I was swayed by the photos on UKMoths. There is a Grey Pine there almost exactly the same as this specimen, whereas the Spruce example has much lighter crossbands.
I see what you mean, but to my eyes that particular UKmoths Grey Pine Carpet is a very odd one (perhaps a variety that is commoner in Scotland than the ones I'm familiar with in the south?), and I would say that their example of Spruce Carpet is exceptionally dark and contrasting.
But they are tricky, and I suspect we may be arguing ourselves into saying that we can't be 100% certain from the photo.
See also the notes on these two species in Butterfly Conservation's 'difficult species' guide:
Entomologist and biological recorder
Clearly they are indeed tricky! Thanks for the link.
Lat/Lng: 51.360546, 0.034151
OS grid ref: TQ417643