Philosepedon humeralis

The two veins between the main forks were easy enough to see on this. The elongate necks of the antennal segments are a little harder to make out clearly as they are covered in hairs, but it helped that I had recently processed a Psychoda which was similar in this respect (the segments were wider than on the Psychoda). I had to dissect it and view under a compound microscope to see the retinacula, but the presence of two pointed me to Philosepedon. This species is the only one in the key in this genus.

male Philosepidon humeralis showing wing, North Elmham Cathedral Meadows (Norfolk, UK), 7th March 2020