This beetle just landed in a shallow puddle in the street so a grabbed a few photos.. any ideas? Dytiscus?
No interactions present.
At high magnification, towards the front of its right elytron I think you can just make out a couple of the transverse lines of punctures (as opposed to the usual longitudinal lines) that are its USP.
Lat/Lng: 52.7, -2.8
OS grid ref: SJ4913