I can't find an oil beetle like that.
I am put off by their symmetrical placement, but I wonder if the red lumps are Trombidium mites.
...Like on this cranefly - http://www.projectnoah.org/spottings/8306999
The oil beetle might be a regular Berberomeloe majalis (with the red abdominal bands concealed).
or Meloe proscarabaeus.
In any case, good spotting!
Thanks for the reply. I've made an enlarged crop of the area of the thorax.
The red bumps are very symmetrical as you observed. Unless the beetle has some weakness in its exoskelton at this point I can't see why there would be two mites on each side in the same place. Also there is no evidence of mite's legs so I strongly suspect this is part of the beetle.
I couldn't find this beetle either, hence the question. Obviously, it isn't one of those found in the UK!
This is the beautiful Physomeloe corallifer. This species, the only of the genus, is endemic of southern half or Iberian peninsula. It's a spring species like the much more common Berberomeloe majalis, and, like this species, it shows a curious evolutive convergence with genus Meloe despite not being closely related with that genus (both Berberomele and Physomeloe are related with Lytta more than with Meloe).