In Marks I have bought clothes between size 14 and 18, depending on the fit. I cannot find anything I like in the sales in those sizes as they are popular.
My daughter is a size 8 to 10 so is always pleased at the bargains I get her. Once she had a big works dinner, and she was complimented on her outfit by many people. 6 pound dress, 3 pound shoes and 4 pound handbag. All from the sales, and I bought and the last two items from Marks.She owned up to a works friend that I had bought these things, and she jokingly asked if I would do the same for her.
The LBD that I bought I bought in the sales was very handy as my daughter had some big bills to pay that month. Shame I cannot get much for myself.