Marks and Spencer is a «premium» brand. They sell higher-end clothing and housewares in their larger stores and recently started a branch selling convenience foods, with their«premium» quality. Prices are just a little higher than regular shops, but again, this stuff is excellent. Sandwiches, crisps, sodas, salads are all ready to eat. There is also an excellent selection of ready-to-heat meals, such as pizzas and soups and Indian foods. And some stuff that needs preparation, like salmon and chicken breasts and minced beef. This location is land-side, at the North end of the arrival waiting area.