I don't have any literature for identifying these.
No interactions present.
Charlie / Boris,
Thanks for the ID. What features indicate that it is that genus?
What would be needed to get to species level?
Otiorhynchus = rostrum with ears.
You see the pit-like antennal grooves between antennal base, and eye. This, plus rather large size, is pretty characteristic.
Your photos will be fine to confirm the species* - personally, I'm not experienced with armadillo (+ a lookalike, both imports to Britain).
* but not for me, sorry!
I'll see whether I can find some relevant literature to work out the ID then.
vs. O. aurifer (the look-alike):
Lat/Lng: 51.540316447216, -0.32921433448792
OS grid ref: TQ159837