Rather humped-looking gnat like insect. Attracted to lighted room.
No interactions present.
Being so used to the small black fungus gnats that hang around the house plants I was inclined to doubt this ID but having looked at Google Images it does indeed look like a fungus gnat. Thanks for the ID :)
I could get it to genus, probably, but it would mean looking through my entire collection - time's too short unfortunately.
could well be a species of Leia, but that's just educated guesswork really
Thanks for the further info John. I'm quite happy with calling it "Leia sp.?"
Lat/Lng: 51.5, -0.2
OS grid ref: TQ2983