That's bindweed - roundup is one option, boiling water over the whole area (every time it reshoots) is another option and last one would be to strim it down to soil level everytime it resprouts. There is no quick fix but it's not a large area so should be ok.
If it's under a bush you want to keep then repeated cut back is the best option, keep an eye out for new shoots and nail them asap... soon the (extensive) root system will use up all its energy trying to resprout and it'll die. It'll probs take most of the summer but once the initial cut back is done it wont be that hard to maintain.
That's bindweed - roundup is one option, boiling water over the whole area (every time it reshoots) is another option and last one would be to strim it down to soil level everytime it resprouts. There is no quick fix but it's not a large area so should be ok.
If it's under a bush you want to keep then repeated cut back is the best option, keep an eye out for new shoots and nail them asap... soon the (extensive) root system will use up all its energy trying to resprout and it'll die. It'll probs take most of the summer but once the initial cut back is done it wont be that hard to maintain.