4cm long, fine hair with single black spike on back.
No interactions present.
Pretty sure this is a Grey Dagger (Acronicta psi). The moth has wonderful black daggers on its wings
Lat/Lng: 52.5725426, 0.5116894
OS grid ref: TF703001
Found under Damson tree (Prunus domestica subsp. insititia), and happily ate some leaves when offered.