Dark/grey dagger

Moth trapping is almost non existent this year, with catches the lowest I have ever known on the few occasions I have been able to actually run the trap. Last night I caught just 3 moths ( would normally be catching at least 100 a night at this time of year), a Light brown apple moth, a Shuttle-shaped dart and this Dark/grey dagger. 
If you get a chance to look at my back  blip of the Ouse Valley viaduct from yesterday please do, it is a fascinating place!