large plant, around 24 inches in diameter
No interactions present.
Is, surprisingly, an Umbellifer (Apiacea now, I think) - related to wild carrot and hogweed. (This is also the family many spices and herbs belong to: cumin, coriander, fennel, parsley, fenugreek, aniseed, and others.)
Lat/Lng: 51.67867, -4.2659
OS grid ref: SN434001