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..about Sonchus arvensis, but rejected because of auricles and I couldn't see glandular hairs. But it's difficult to tell on this rather indistinct photo.
I think I can guess them on the first pic, against the black background, but it is not that clear I agree!
... favouring Sonchus arvensis are the "shaggy" capitula, and the barrel-shaped buds (the buds are conical in Sonchus asper and Sonchus oleraceus.
I would have said that the first picture was an obvious Sonchus arvensis and that the second picture was a bit ambiguous.
Lat/Lng: 52.3445, -2.2856
OS grid ref: SO806718