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Ok I will go with "Eledone cirrhosa" as on close examination tentacles appear to have a single row of suckers.It is not "Curled" in the photo, as it is dead
Eledone has a single row of suckers, Octopus has two. The image seems to have only a single row.
Lat/Lng: 53.3181, -4.2079
OS grid ref: SH530824