No interactions present.
I can't be absolutely sure of the shape of the hind-angle of the pronotum, but the general appearances seem consistent with Nebria. Nebria brevicollis is a very common groundbeetle, so this species is quite likely.
Yes, there were several brevicollis in the rest of the sample. Thanks for looking at this, and the others - I ran out of time to key them through on Sunday!
Record your ladybird sightings!
Lat/Lng: 51.4928, -2.6596
OS grid ref: ST543773