Spider? Crab?

Spider? Crab?

Observation - Spider? Crab? - UK and Ireland. Description: On first sight seemed to be 'grazing' in a manner similar to a crab, picking over the surface with small parts adjacent to mouth and transferring material to mouth parts (spidercrab005). Later it was in a more sheltered spot lying still with limbs stretch

On first sight seemed to be 'grazing' in a manner similar to a crab, picking over the surface with small parts adjacent to mouth and transferring material to mouth parts (spidercrab005). Later it was in a more sheltered spot lying still with limbs stretched out and flat to the wall (spidercrab004). Whilst still it measured almost exactly 80mm from longest limb tip to longest limb tip.
These pictures have been processed to bring up detail, original RAW files are available.