I wear elasticated waist linen trousers every summer. Going by the amount sold in M&S so do thousands of other ladies, young and old. Also, those being sniffy about certain shops need to remember not everyone has the same shape, height, weight or budget. As I said earlier, when working I lived in Jaeger, when it was excellent quality, along with LK Bennett, Hobbs, Coast, Jigsaw etc etc. Now, my needs have changed. I buy lots from M&S, Seasalt and, yes, the much maligned BonMarche where I find quite nice items in amongst the gaudy patterns.
A lot of snobbery on here about brands I think. I’ve yet to go up to another lady, pull the labels out of her garments to see where she bought them from. Still, others might do.