Yes alisonr, I am familiar with those online stores, thanks for posting though.....it's actual physical shops I am trying to find, where I can go and check things out and try stuff on. Oh Macy's where are you when I need you? LOL.
I'm afraid it's mostly online. Even department stores/supermarkets that do
offer plus sizes, tend to pull an Old Navy, and not stock anything over a 20/22 in the shop. And while there are other plus-size retailers that do have brick & mortar shops, they're all down in England. And, by 'England,' they mean London. And by 'all', they mean 2 or 3, at most.
Yours Clothing actually
has opened a handful of shops in the Central Belt, but their stuff doesn't tend to be to my taste. (Neither is Evans, really, and it's also overpriced.)
The one up-side here, vs. the US, is that there are a lot more catalog/online retailers, and they offer very easy credit, cheap/free shipping, and free returns. So, I tend to order from SimplyBe/Marisota, and sometimes from Curvissa (though Next and K&Co/Littlewoods do this, too). Because I'm ordering on account, I'll order multiple sizes/colours, stuff I'm not sure about, etc., and then just return it if I don't like it or it doesn't fit. If I'd tried to do that in the U.S., it would've meant having $$$ tied up waiting for a refund, and probably losing out on shipping charges.
Since, unlike me, you can actually drive to real shops, you might want to check if places like ASOS, New Look, etc. let you order online and send to a local(ish) shop; that way, you can actually go in, try stuff on, accessorize, etc., and return stuff right there at the shop. I've done that with JCPenney in the US, and I'm sure Next do it here.
But, in general, I'd encourage you to check SimplyBe/Marisota (same company, same credit account, just slightly different ranges) and Curvissa. They've got a good range of styles.