Everyone who shops at Asda has been issued a £672 warning after new analysis from consumer magazine Which?.

A new price comparison has found that Asda shoppers are paying £12.93 more per weekly shop than customers of Aldi, which was the cheapest supermarket in December’s figures.

It means that Asda shoppers would pay £672.36 more than Aldi customers across 52 weekly shops if the same price gap was maintained over a year.

It found Aldi was the cheapest for the 56 items, coming in at £100.29, while Waitrose was the most dear, coming in at £129.83, about 30% more expensive than Aldi for an equivalent basket of goods.

Asda shoppers would have paid £113.22 for the equivalent basket of goods in December, Which? found.

The magazine also compared a larger basket of 158 items, for which it excluded Aldi and Lidl as not all items were available in the smaller budget supermarkets.

In that comparison, Asda placed fourth, behind Tesco (with Clubcard prices), Sainsbury’s with Nectar prices included and Morrisons with More Card prices.

Tesco was £410.40 for its 158 items, whereas Asda was £415.56, although this doesn’t take into account possible cashback offers with the Asda Rewards app.

Harry Rose, editor of Which? magazine, said: “Our research shows Aldi has retained its crown as the UK’s cheapest supermarket in 2024.

“After the added expense of the festive period, many households will be looking to cut costs.

“Our analysis shows that by switching supermarkets, shoppers can make significant savings, highlighting the advantages of shopping around where possible.”

The results showed a December shopping list of 56 groceries cost £100.29 on average at Aldi.

Lidl came a close second, with the same shopping list costing £1.19 more (£101.48) with the supermarket’s loyalty scheme Lidl Plus, and £1.27 more (£101.56) without.

Lidl also remained in second place behind Aldi as the cheapest supermarket for smaller shops throughout the year.

Waitrose was £29.54 pricier than Aldi in December, at £129.83, and remained the most expensive supermarket for smaller shops for every month in 2024.