I think it is the dreaded bindweed which spreads everywhere if you are unlucky enough to get it in your garden. I should pull it up and dispose of it carefully - NOT on the compost heap as even the minutest piece of stem grows into another plant and it just takes over everything.

It looks like that to me too,motinot..sorry!

It had crossed my mind....Wonder how it got there....thanks ...i shall remove it forth-with..:>)