Anthobium unicolor, 2nd county record if I'm right.
I'm not getting anywhere with this though. (Help via the Cranefly Recording Scheme - it isn't a cranefly, I thought it was - "It’s a window gnat Sylvicola cinctus or fenestralis." I need to head over to Steven Falk's Flickr pages to see if I can determine it to species.)
It’s a window gnat Sylvicola cinctus or fenestralis.
I was given a good tip with the Helophorus aequalis/grandis couplet problem, shove a bit of paper under the elytra, it works well, the teeth are instantly revealed.
Helophorus grandis, to light 21/02/2019.
Light trap, lots of slugs, Trichocera regelationis one Helephorus grandis, no moths.
Under the living room window 16/02/2019