Stretchy flared leggings for a bloated painful gut? Help please!

[Cwtchkin]

I’ve got Crohn’s disease and when I have a flare up my gut gets very painful & sensitive to anything tight around my waist.
I’m looking for some very stretchy flared leggings that I can tolerate. I’ve also thought that maternity ones might be a good choice. I don’t want to spend more than £20. I’m living in a rural area so online shopping would be easiest for me.
I’m size 18-20, although the waist would need to accommodate a larger size, and I’m around 5 feet 3 inches.
Can anyone recommend any that I should look at.

I've just bought some wide legged ones from Primark OP. They were a tenner and are so comfy. I'm 19 weeks pregnant and I'd happily live in them right now.

Go a size up?

Next used to do soft stretch cotton trousers that might be worth a try.

https://notbasics.co.uk/collections/leggings/products/organic-cotton-flared-leggings a friend has these and swears they're the most comfortable thing ever but they're outside of your budget.

I think they're more like £30 but lots of people raved about Halara leggings on here.

I have some from H &M I'd recommend