You’re wrong . Only supermarket worthy of my money, I wouldn’t say any supermarket is a “posh” shop. I find I save money shopping at M&S and have much less food waste because the foods of much better standard particular the fresh fruit & veg.M&S is over rated, it’s just not worth the money and the food is just overly salted or stuffed full of sugar to con people into thinking the price is worth it. Anytime I’ve been in the UK I would choose a Waitrose over a M&S any day when it comes to posh shops.
It’s not just groceries, it’s M&S groceries.