I think the article i spot on. In many stores, the footprint that the Classics section gets is far greater than some of the others, so it disproportionately stocks clothing for the older woman (whether you like those clothes or not is a different story) and gives the impression that that is its focus.
I reguarly buy in M&S. Certainly all my underwear, usually my jeans and some of my dresses. Bought 2 dresses last week, smock-style, lovely colours, good cotton, 20 quid each.
Someone else said something I agree with strongly - they need toe expand their good quality basics. Ranges of solid quality cotton tops, v-neck and crew neck, short sleeved and long (like Primark only better). Same with good cardigans of every colour of the rainbow (I like the H&M ones).
And stock some damned maternity clothes!! For such a large clothing store I cannot understand why it has no maternity clothes!? It is bananas.