I've seen a lot of this recently but alas, have misplaced my plant key...
No interactions present.
It grows a lot in our garden, i must have pulled masses of it out of our veg plot.
We will soon know the ID without me putting on yet another picture.
Now we know and we didn't have to wait long :)
Lat/Lng: 52.6, 1.3
OS grid ref: TG2308