What to do with raised bed/bindweed

[SlimeSuspect]

The only bed in my hard landscaped back garden is a brick built 4m x 1m raised bed. I have been fighting a losing battle with bindweed over the past few years.

Will I need to completely remove the soil, line it with something the bindweed can’t get through and start again with new soil? Is there another option? I’m not a fan of roundup or other harmful weed killers, plus, they’d wipe out anything new I planted there anyway. The jasmine that was there died last year, and only two evergreen shrubs remain (that I’m not hugely fond of anyway!).

Time to start again, or any helpful suggestions?

How is it taking over? As in entry point? It grows fast, so you need to be all over it so it doesn't have the chance to photosynthesise. I will never get rid of mine, as it grows over from next door, but my neighbours are otherwise wonderful. I just keep pulling it out and get as much as I can each time. You can plant bamboo sticks to make it easier to spot, as it wants to climb.

Cardboard over it and build up with soil on top ala raised bed?
I can't imagine it being possible to completely eradicate by digging as the smallest root will easily propagate.

Roots are pretty easy to spot when you dig through the soil, but they are brittle so if you leave a little bit it will soon be back. I just pull it up when I see it and accept that it’s never going to be a finished job. I find it quite therapeutic.