Is this a rather worn Common Carpet?
I can't find anything else that comes as near but I'm not happy about the identification.
No interactions present.
I thought it looked somewhat like obscurata but dismissed it as highly unlikely to be found in Carlisle!
I still have the specimen and will keep it till I can get the local recorder to have a look at it.
Lat/Lng: 54.908, -2.936
OS grid ref: NY400574