Looks a bit like giant hogweed however the leaves and stem look different.
No interactions present.
Rheum is Polygonaceae, Gunnera is Haloragidaceae.
David J Trevan
You know when you cannot think of what it is but it is so familiar and you get it wrong,well that's me.It was annoying me as I could not think of the name or genus
...Chinese Rhubarb. Can get really big. Leaves poisonous.
Lat/Lng: 54.804, -3.981
OS grid ref: NX727472