Top Shop - there hasn't been one in my town for years, but last time there was, they didn't do size 16, so I only ever bought things like shoes there and have never bothered to check out branches in other places.
Uniqlo - none in my town or whole region as far as I'm aware, I've only been on one once in my entire life (at least 20 years ago in London) and didn't see anything I liked.
Mint Velvet - I like their stuff, there's one in a town I go to fairly often, but somehow I've never quite found anything I could justify buying.
I've never shopped at Karen Millen, Mango, Oliver Bonas or Reiss for no particular reason, just didn't find the stuff in the windows all that appealing. (Although I had a second-hand Oliver Bonas bag, which didn't last all that well.)
Not a shop but a brand - I don't buy Made In Italy any more, because I heard something sad about their working conditions and pay. I like that style though, and would consider buying similar looking but higher quality brands like Grizas and Oska second-hand or at affordable sale prices.
Shops I do like:
Charity shops and TKMaxx most of all, also River Island, FatFace (especially for jeans), H&M, New Look (good for basics, but I don't like their more individual stuff as much as I used to), M&S, Tu at Sainsburys, those brands like Apricot and Izabel that you often get in department stores, and I miss Mantaray and Principles at Debenhams. If I had an unlimited clothes budget, I'd buy Grizas and Oska as mentioned above, and also Marimekko.