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Anopotrupes stercorosus, I think.
G. stercorarius has a different shape, deeper lines on the elytra, and a less punctured pronotum. You could not in any case separate G. stercorarius from G. spiniger from an image like this (both would occur in that area) to be 'sure'. I would not be 'sure' it was A. stercorosus, but I think the balance of the features we can see points there.
Lat/Lng: 51.8786, -3.1238
OS grid ref: SO227206