After reading all the negative comments here I find myself asking why anyone bothers looking for clothes in M & S. I only buy knickers there, when I find a suitable style and fit I buy half a dozen pairs, and children's socks as adults socks are too big for me. In the past I bought their 34AA bras but now they only stock them in mega padded "two sizes bigger" styles and children's bras.
I am 5ft and 7st 7lbs and size 6 so usually need to buy from petite ranges. The minuscule M & S petite is only available on line and is even more dire than their main ranges.
Petite ranges, across all stores which offer them, lack style choice and quality and are invariably aimed at the very young or very old, I am 55. Principles used to be good but since being taken over by Debenhams has gone downhill. Monsoon did a reasonably good range but that has now been discontinued. Next has the most extensive range but much of it is very boring and there is far too much polyester. Banana Republic Petite is easily the best for fashion conscious women in their 50's but unfortunately it is not available on line unlike their standard sizes. I now buy over 90% of my clothes from ebay and mix and match items from petite and standard ranges. The majority are from Gap, the old Principles, Banana Republic, H & M, Next, Topshop, Monsoon along with various others. Where do other small fashion conscious women buy clothes I wonder? There is so much more choice for large women but unlike the overweight or obese, who could possibly lose weight, I have no control over my height.