Cantharis nigricans
A common species that seems to be relatively easy to identify, although going through my photos recently I discovered some old photos from when I first started looking at beetles which were incorrectly labelled as this species (they were in fact Cantharis pellucida and Cantharis rustica).
Considering the number of daytime observations, I've had very few to light which suggests this species might be more reluctant to come to light than some Cantharis species (or perhaps is just uncommon around my garden where I do most of my light-trapping).
Cantharis nigricans, Carsaig, Mull (Argyll & Bute, UK), 13th June 2019
Cantharis nigricans, Irton Fell (Cumbria, UK), 12th June 2021
Cantharis nigricans, North Elmham Cathedral Meadows (Norfolk, UK), 19th May 2018
Cantharis nigricans, North Elmham Cathedral Meadows (Norfolk, UK), 23rd June 2021
2x Cantharis nigricans, Hills & Holes (Norfolk, UK), 21st May 2020
Cantharis nigricans, North Elmham Cathedral Meadows (Norfolk, UK), 25th May 2018
Cantharis nigricans, North Elmham Cathedral Meadows (Norfolk, UK), 25th May 2019
Cantharis nigricans, North Elmham Cathedral Meadows (Norfolk, UK), 25th May 2020
The two photos on a white background are different individuals but I think one of them (I'm not sure which) is the same as the one on a leaf.
2x Cantharis nigricans, Hell Pit near Longham (Norfolk, UK), 28th May 2016
Cantharis nigricans, North Elmham (Norfolk, UK), 28th May 2017
Cantharis nigricans, Creaking Gate Lake (Norfolk, UK), 22nd May 2015