Compare like with like
When a guide mentions an ingredient, check the product name, net quantity and any drained weight on the current pack. A larger pack can cost more at the till even when its unit price looks lower. Record the number of whole packs you need, not just the amount used in the recipe.
Read the current label
Ingredients and allergen declarations can change with a reformulation or a different size. Check the packaging every time if an allergen matters to you. An online listing, barcode database or earlier purchase is not the final authority for a product in your hand. The official allergen-labelling guide explains what information food businesses provide.
Price belongs to a shop and date
Barcodes do not carry a universal UK selling price. Shelf and online prices, loyalty offers and availability can vary by retailer, branch, delivery area and time. Our editorial shopping examples do not claim to read live prices.