It depends on your size, really - as I am both ridiculously tall and, erm, well, let's say curvy, I find that Long Tall Sally and SimplyBe are my go-to sites. But as I seem to remember you being normal-sized, have you tried Next, Top Shop, Dorothy Perkins, H&M, Marks and Spencers or The Gap? (Funny story, I went into a branch in Cardiff specifically so I could call searingidolatry and say "Help, help, I've fallen into The Gap and I can't get out!" Luckily, she found it more amusing than the security guard did.)

Have you considered getting one of the catalogues, like Littlewoods or something like that? Asda and Tesco can also have some nice things in their clothing sections.