One of a number of mating pairs.
No interactions present.
A nice clear shot of T.tenebricosa, reinforcing my belief that the quite similar but much smaller, more dimpled beetles with less flared thoraxes I find near my home are the Lesser Bloody-nosed beetle http://www.ispot.org.uk/node/256816 http://www.ispot.org.uk/node/254654
though no expert has confirmed this yet!
Nick Upton, naturalist and photographer.
Your species certainly looks smaller, Nick
Hampshire Dragonfly recorder
Hampshire & IOW Wildlfe Trust
Lat/Lng: 50.9657, -1.9206
OS grid ref: SU056184