I suspect this is a small Seraphim not a Small Seraphim.
Attracted to MV light
18/v - 4
No interactions present.
Not really the correct word for halteres, which were weights used by ancient Greek long-jumpers to propel themselves further, rather than weights for lifting.
My Flickr photos...
I've had my local expert look at this moth and she has confirmed it as Seraphim as I thought.
Lat/Lng: 51.540316447216, -0.32921433448792
OS grid ref: TQ159837