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flag UK supermarkets use hidden codes on produce labels to show freshness, not safety, with varying formats by retailer.

flag UK supermarkets including Asda, Tesco, Sainsbury's, and Morrisons use hidden codes on fresh produce labels to indicate best-before dates, helping shoppers choose fresher items. flag Codes vary by retailer: Tesco and Asda use a letter-number format, Sainsbury’s uses a 'J' to 'S' code with the date in between, and Morrisons uses the first letter of the month followed by the day. flag These dates reflect quality, not safety, so produce is often safe to eat past the date if it looks and smells fine. flag Morrisons is also rolling out digital electronic shelf labels starting in early 2026, replacing paper tags with real-time price and promotion updates to improve efficiency and customer experience.

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