Retailer admits it struggled in June heatwave and also had to order more ice-cream to keep pace with demand Marks & Spencer is investing in refrigeration equipment that can cope with weather as hot as 45C as the climate crisis is expected to drive regularly higher temperatures in the UK. “There is no doubt we were struggling in the nine days of [recent] extreme heat,” Stuart Machin, the chief executive of the food, fashion, beauty and homewares retailer, told shareholders at the group’s annual m