Asda no longer UK's cheapest supermarket for a big shop as top store saves families £35

It's the first time since January 2020 that Asda has been beaten for value for a big weekly shop

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Asda is no longer the UK's cheapest supermarket for a big food shop, according to Which?. Aldi has been named the cheapest supermarket for a standard basket of shopping for the 14th month running, while Asda has been knocked off the top of the leader board for the cheapest big shop in July.

Each month, the consumer website compares the cost of an average basket of 38 items and bigger trolley-load of groceries at the UK's biggest supermarkets. Asda's big shop usually proves cheaper than the rest, but the retailer has now fallen into second place for the first time in three-and-a-half years.

For the smaller basket of shopping, Aldi's was the cheapest at the till, costing £71.22 on average across the month. Lidl was just behind, with a difference of £1.38 between the two baskets, while Waitrose was the most expensive, with the same shop totalling £87.24 on average - a £16.02 difference compared to Aldi.

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Which? also compared the cost of a larger trolley of 135 popular products - the original 38, plus 97 more - including branded items like Andrex toilet paper and Cathedral City cheese. Aldi and Lidl aren't included in this as they don't always stock these products.

For the first time since January 2020, Asda's big shop was beaten for value. Asda's trolley came to £342.14 on average, while Morrisons averaged £341.92.

Tesco came in third place for the larger shop at £360.97, while Waitrose's was the most expensive once again at £376.66 - that's £35 more than Morrisons. Natalie Hitchins, Which?'s head of home products and services, said: “For a larger trolley of items, Asda has been knocked off its perch as the cheapest option for the first time in several years with Morrison pipping it to the post for value.

“Which? believes that supermarkets are currently failing to adequately help shoppers during the current crisis. They must ensure everyone has easy access to basic, affordable food ranges at a store near them - including providing a range of essential budget lines that support a healthy diet in smaller convenience stores where they have them.

“They must also provide transparent and comparable pricing so people can easily work out which products offer the best value.”