No interactions present.
What is it about the moth that has made you go for an identification as Svensson's Copper Underwing? The key feature to distinguish between the two relates to the pattern on the underside of the extended hind wing.
I must admit I am a total novice on moths but taking a look in the "Field Guide to the Moths of Great Britain and Ireland" it seems the oval mark appears paler and the forewing seems to have less pronounced marking compared to Copper underwing. I did not get a view of the underwing unfortunately.
Would I need a photo of the underwing to clinch the ID?
a photograph of the extended hindwing would help to establish the identification. There are a number of "methods" based on upperside characteristics, but none of them are reliable.
Thank you Robert for informing me on that. In future, would it be easiest to photograph the moth from the underside using a transparent surface and looking from underneath upwards?
The text for Copper Underwing in "Field Guide to the Moths of Great Britain and Ireland" will tell you what to photograph and how to go about it - you will probably need 3 if not 4 hands.
Lat/Lng: 51.715, -0.4594
OS grid ref: TL065029