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...difficult to go beyong ray - looks likely to be R.clavata - I wouldn't go there.
Interestingly Shepherd's Purse is a plant but I wouldn't move this just rename your pic.
Maybe if soaked in water and with a scale beside it, it could be narrowed down a bit?
....still wouldn't be a shepherd's purse.
Lat/Lng: 50.72, -1.805
OS grid ref: SZ138911