A Which? investigation compares the shelf life of fresh, perishable food sold by UK supermarkets and finds notable differences between retailers. It reports that Waitrose ranks last for the average time shoppers are given to use items before they are no longer fresh, while Asda performs best.

The outlets describe the study as highlighting how shelf life can vary in practice for similar product categories, affecting how long customers have to consume goods after purchase. While Daily Mail coverage focuses on the contrast between the most expensive supermarket and the budget option, the underlying findings are attributed to Which? and are presented as a measure of average shelf life rather than a broader assessment of quality or pricing across all products.