What kind of situation is it growing in. Also, is it widespread in your area or just confined to a small patch?
Thanks Wulf
It's concentrated mostly around one area of my plot, although see some popping up elsewhere as well.
Found quite a few of the roots when I originally dug over the plot when I acquired it in November.
I'll get a close up of some leaves if I can.
Plot neighbour thought it might be something called "sow-grass or sow-weed" (pronounced sow as in female pig

)