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Had a look at that one on marLIN but not sure - my specimen doesn't have the midrib although that could be because it is a small specimen. The anchoring strand seems very long compared to other pics found in google images too.
The magic of nature is all around us - we just need to learn how to see it.
Lat/Lng: 53.7829, -3.0593
OS grid ref: SD302323
Found on beach after rough weather likely to have come from much further afield rather than being a local species, perhaps from as far away as North Wales.