Yep from me too.
![Sad :(](https://chat.allotment-garden.org/Smileys/green/sad.gif)
I've just spent the dying moments of daylight digging some from my borders.
![Roll Eyes ::)](https://chat.allotment-garden.org/Smileys/green/rolleyes.gif)
If you dig your fork in and turn the soil, you should see a load of pure white root fragments about 2-5mm thick. Each one of these is capable of shooting and making a new plant which will grow into a wiry winding climber that grows a mile every day and entwines round everything.
Other than that, they're not a problem. You'll find dozens of them sprouting every day but if you're keen with a hoe, you can keep it under control and dig out every scrap you can find when you next dig.
Rob
![Cool 8)](https://chat.allotment-garden.org/Smileys/green/cool.gif)