Anita added: "Unlike Lidl, Aldi uses red stickers to highlight its discounted products. Red-sticker items are scattered across the store, so keep your eyes peeled. From meat to packaged goods, Aldi tends to mark down items by up to 75% on their final day of sale."

Christmas Eve often marks the start of festivities - or a mad dash around the supermarket to pick up all those las minute bits, but shoppers need to be savvy.

Christmas Eve: Open as usual (times vary between Scotland, Northern Ireland, Wales, England and London). Boxing Day: Some stores, mainly in London, open from 9am and closing between 5pm and 9pm. Check online for individual store opening times on the Iceland website.