Alexanders or Horse Parsley.
I don't know if it's every where in the country but seems to ever where here now. When I was a kid we only saw it near the coast but it has spread inland and is in all the hedge rows and verges. Quite sort after by foragers but we used to call it stink weed as not a nice smell when flowering.
Alexanders, Horse Parsley, Smyrnium olusatrum
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How to identify Alexanders, Horse Parsley, Smyrnium olusatrum
Cheers Arry