Definitely agree with going back to good quality basics that are not frumpy but timeless. I hate frilly clothes but love some pieces by chains like Whistles and Comptoir where there is perhaps one element of the clothes that distinguishes as something that has been designed rather than churned out. I want clothing that I can wear year after year with just a change of accessories or a seasonal piece and know its going to last, look good and flatter me. I find it almost perverse that you often spend more money on clothing that is simply designed but well cut and good quality. Surely there is less effort in achieving that?
Move back to natural fabrics as well. It's not just M & S that's guilty of this, a lot of the high street are and it makes my teeth itch. The White Company are good at this.
Not everything has to have a pattern, frill, logo etc - I want clothing that doesn't scream where it was bought from and can be mixed and matched with the rest of my wardrobe. Same goes for the boys clothes - I don't want to dress my son in synthetic knitwear and even when I do find something I like I don't want it to be part of a twee outfit. I want him to dress like a little boy but not be shoehorned into the stereotypical idea of what a boy should dress like. I hate Next for this too. Let me buy good quality items in a good range of colours that are not variations of bleurgh brown or blue. Boden is expensive but at least I can get some good quality basics that last and can be mixed in with plain basics from H & M.
I have been been lucky with shoes but I have small feet so am often able to pick up the more expensive ranges in the sale or a tenner or less and often get compliments on them.
Underwear - increasingly expensive but no discernible difference in quality. If anything, it's declined. I have made repeated mistakes in giving them one more go but having just been to Selfridges today and Peter Jones on Saturday, I've resolved that in future I'd rather just have the minimum in underwear but of the best quality. I'll probably save a lot of money in the long term if I stick to my resolve.
Ditch some of the designers etc in homeware - you frequently see the Conran range on sale as its over priced in the first instance. Stop creating whole ranges in the same design. It reminds me of my mum's mid 80's room that was top to toe in Country Lady. Again, look to the White Company and John Lewis for good quality, classic bedding and accessories. I want to be comfortable in bed, not an overheated mass of static from the polyester count.
Finally, stop trying to do everything - ditch technology, the banking, silly designer labels (I don't want to be seen in what Lisa Snowden, Twiggy et al are wearing). M & S isn't a department store and shouldn't try to do everything as it is spreading itself too thinly. Focus on what it is traditionally known for and get back to basics.