Tesco is urging customers to use a "white envelope" code in any of its stores if they need to.
The supermarket giant introduced the scheme for people who are struggling to afford sanitary products amid the cost of living crisis. Shoppers have recently spotted signs in Tesco stores across the UK.
The notices, which are placed in supermarket toilets, read: "To combat period poverty, Tesco want to ensure everyone has access to sanitary products.