Every Foster's listing we found at the supermarkets we check, side by side: the shelf price, any Clubcard or Nectar price, advertised multibuy offers and the price per litre. Each drink is a section, most widely sold first, with its packs cheapest per litre first.
Prices are each supermarket's default online listing without a delivery address (Aldi's are the in-store prices it publishes, as it doesn't sell beer online), so they may vary by location and delivery method. Minimum unit pricing applies in Scotland and Wales, and multibuy offers are not available in Scotland.
We check the beer and cider ranges at Tesco, Sainsbury's, Asda, Morrisons, Waitrose and Aldi about once a day and keep every listing whose name carries the Foster's brand. Prices are each supermarket's default online listing without a delivery address (Aldi's are the in-store prices it publishes, as it doesn't sell beer online), so a local price or a store shelf can differ, and the supermarket's own page is always the one that counts.
Foster's is the brand named on the listing. The drinks on this page are sold by the supermarkets, and every “Check at” button goes to the supermarket's own product page. UK Beer Deals is independent of Foster's and of every supermarket: we earn nothing from these links, and nobody pays to be listed or to appear higher up.