Found sheltering on a wet day last summer. About 10mm long excluding antenna.
No interactions present.
This looks very much like the picture of N. scabiosella (=N. metallica) in the photographic guide by Manley. Adela rufimitrella is a commoner moth that flies a bit earlier than your observation date, but looks pretty similar.
Lat/Lng: 53.6479, -1.253
OS grid ref: SE494170