Which? reveals cheapest supermarket of the year

Which? has revealed last year's cheapest supermarket which offered the lowest-priced grocery products for 11 out of 12 months.

The consumer champion kept track of the cost of a basket of groceries at the UK's eight biggest supermarkets every day throughout the year, revealing the cheapest supermarket at the start of each month.

Aldi was the cheapest supermarket of 2023, according to Which? analysis. Lidl, the second-cheapest shop for the year, beat its budget rival once in October, becoming the cheapest retailer that month.

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Which? said that the two supermarkets were consistently close with their monthly basket comparison, with the price difference between them averaging just £1.33 across the year. Meanwhile, Waitrose was the most expensive supermarket for a small basket of groceries for every month of the year.

It was also the most expensive for a larger trolley analysis for every month except September, when Sainsbury's was priciest for the first time - for shoppers not using a Nectar card.

Which?'s final basket analysis of 2023 took into account 43 popular grocery items including Cathedral City cheese, chopped tomatoes, apples and milk. Aldi came in as the cheapest supermarket overall, at £74.83 on average.

Lidl was second cheapest, at £76.74. Waitrose was nearly £20 more expensive than Aldi, with an equivalent basket of groceries coming in at £94.94.

When it came to the traditional 'big four' supermarkets, the comparison revealed that Asda was cheapest, at £84.41 - but Sainsbury's and Tesco were right behind it, coming in at £84.54 and £84.86 respectively.

As part of the analysis, the consumer champions also compared the