I think they have lost sight of what people want....good quality wardrobe staples....and are trying to please too many people;
Classic range is for old ladies
Per una for middle age ladies (who like ankle length skirts in wierd fabrics)
Autograph for ladies who want to look more designer
limited for trendy young ladies( but m and s just is not trendy is it?)
But there are loads of shops on the high st that cater for each one of those groups and do it better.
Try going into m and s looking for black skinny jeans, nice washable blk work trousers that fit,cotton nightwear,a bra in a 34a,a white t shirt with some Lycra,100 % wool knitwear in fashionable style I fact any knitwear without acrylic in it........I have recently looked for all of these without success.