Not easy. One idea is to put canes in and encourage it to climb up them. Then lay them flat, protect surrounding plants and spray with glyphosate - or you could be justified in trying a deep root weedkiller. Keep a close watch and hoik out every bit as soon as you see it after that. It is a long job as it is very deep rooted but with glyphosate and persistence you should get there in a few years. I did it for five and was just winning when we had to move!

I hate to say it, but we gardeners might probably recommend prayer or invocations, whichever is your choice! since it is such a long-term and invasible problem!

My ex-next-door-neighbour in East Anglia dug out a soak-away for his septic tank 12ft. deep and allegedly still found active bindweed roots! They re-start on the surface from a quarter-inch brittle dropping - why can't we get our treasured garden plants to do the same?!

More practically, I've had some success in the past with stroking them persistently with the appropriate weedkiller as recommended (gloves on, of course) but maybe that's no longer permitted! Otherwise if you can persuade them to climb canes instead of your favourite plants , previous advice is the best...

(Yet we are able to cultivate their relatives! - see beautiful photos on this site...)

Wish you luck!

I unscramble the growth and place in a bottle with the base cut off and spray into the bottle.
I can't remember where I read it, but Miners found bindweed roots on the way down.
A bit of a bu@@er when it is scrambling up plants and the roots are in your prized plants rootballs. Mine was at the base of a couple of rather large box bushes. But using the bottle method for a couple of years I have, touch wood, eradicated it.

I just keep pulling at mine, it comes over from the fields we back on to, then it gets burnt in our incinerator bin. Agreed it is a pest.

thank you all for your advice it looks like I have a fight on my hands let battle commence!