Shoppers who use a are warned that they could spend an extra £272.04 on groceries annually. The latest monthly analysis from consumer champion Which? showed in February that a shopping basket of 100 popular grocery items at Tesco cost an average of £205.31 for Clubcard members. Without the Clubcard, the same basket came to £212.54, highlighting the importance of the loyalty discount.

However, despite the Clubcard price, Tesco was still pricier than , the UK's cheapest . A comparable shopping list at Aldi costs just £182.64 - £22.67 less per month. Over the course of a year, this price difference could amount to an extra £272.04 for Tesco shoppers compared to Aldi.

, another budget supermarket, was not far behind Aldi. A 100-item shop at Lidl with the loyalty scheme (Lidl Plus) averaged £184.51, while without the loyalty scheme, the same basket cost £184.94, only slightly more than Aldi.

When it comes to larger shopping trips, Asda managed to retain its place as one of the cheapest supermarkets in February.

A 206-item shop at came out cheapest at £512.30, beating Tesco (with a Clubcard) by £3.00, which cost £515.30. This comes after Asda reintroduced Rollback pricing, which claims to have reduced the prices of over 4,000 products by an average of 25%.

Waitrose was the most expensive supermarket in February. A 206-item shop at Waitrose averaged £585.10, while for a smaller list of 100 items, Waitrose's price was £245.79, which is £63.15 more than Aldi - a 35% difference.

For Sainsbury's, shoppers using a Nectar card paid £213.46 for their 100-item basket, which was £30.82 more than Aldi. Without a Nectar card, the cost increased further to £225.20.

The list of 100 items included both branded and own-brand items, such as Birds Eye Peas, Hovis bread, milk and butter.

This analysis from Which? shows that where you shop can significantly impact your grocery bill, with some supermarkets offering much better savings than others.

Reena Sewraz, Which? Retail Editor said: "Our latest monthly analysis once again sees Aldi crowned as the UK's cheapest supermarket. However, Lidl remains close behind its rival. It was also a good month for Asda, as it held on to the top spot as the cheapest supermarket for a bigger list of groceries.

"With people still feeling the effects of food inflation and with prices forecast to rise again, people are likely looking to cut costs where they can. Our analysis shows that by switching supermarkets, consumers could save up to 26%, highlighting the advantages of shopping around where possible."