cf. Pyrausta purpuralis (Linnaeus, 1758)
Pyrausta Schrank, 1802
This is not P.aurata. The pale spot in the basal part of the hindwing eliminates P.aurata. That leaves P.purpuralis and P.ostrinalis. If there was a photo of this from the other side of the glass we could tell which.
Determination author: Jamie McMillan