Aldi has beaten rival supermarket Lidl to be named Which?’s cheapest supermarket in February.

The consumer champion’s monthly analysis involves comparing the average price of a shop consisting of popular groceries at eight of the UK’s biggest supermarkets.

The cheapest supermarket for a shopping list of 100 items was Aldi, where the groceries cost £182.64 on average across the month.

Fellow discounter Lidl was close behind Aldi in February, costing only £1.87 more with the supermarket’s loyalty scheme Lidl Plus and £2.30 more without.

For a bigger shop of 206 items, Asda has beaten Tesco (including a Clubcard) and retained its place as one of the UK’s cheapest supermarkets.

Aldi and Lidl are not included in this comparison as they have a smaller range of branded products compared to the other supermarkets.

Asda came out cheapest at £512.30, beating Tesco with a Clubcard by £3.00 (£515.30). This comes after Asda brought back Rollback pricing - claiming to have slashed the prices of more than 4,000 products in-store and online by an average of 25 per cent.

Waitrose was the most expensive on average, with the bigger shop costing £585.10.

Waitrose was the most expensive supermarket for a smaller list of items this month too, totalling £245.79 on average - a difference of £63.15 compared to Aldi - 35 per cent more.

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 per cent, highlighting the advantages of shopping around where possible."

Julie Ashfield, Chief Commercial Officer at Aldi UK, added: "While other supermarkets are finding it challenging to maintain their price match promises, Aldi remains dedicated to providing the lowest possible prices without compromising on quality.

“Our commitment to value is unwavering, and we believe that shoppers deserve consistent savings, not fleeting promotions or complex loyalty schemes."