Trichostegia minor
The dark and pale bars towards the end of the wing are apparently distinctive for this species. It has a patchy distribution in Norfolk and there are very few records in the Wensum valley.
, Dillington Carr, 26-May-23 (A) (1).jpg)
, Dillington Carr, 26-May-23 (A) (2).jpg)
female Trichostegia minorshowing abdomen tip from below, Wendling Beck Environment Project (Norfolk, UK), 26th May 2023
With it so scarce in the Wensum it's not a species I encounter often but I had seen one before.
 (1).JPG)
 (2).JPG)
male Trichostegia minor, Boughton Fen (Norfolk, UK), 2nd July 2016