The UK's cheapest supermarket revealed - and it's not Aldi, Tesco or Asda

Shoppers looking to save money on their weekly shop might be surprised by who's come out on top in the latest supermarket price comparison. Aldi is often seen as the cheapest, but it's just been knocked off the top spot. Consumer group Which? compared the average prices of 70 popular items, including branded and own-brand products such as milk, bread, and cheese, across eight of the UK's biggest supermarkets.

And this time, it was Lidl that came out cheapest, with a basket of 70 goods costing £120.38 with a Lidl Plus card, or £120.46 without it. Aldi followed closely behind at £121, while Asda was the third cheapest at £132.69. Which? said the findings showed just how tight the battle has become between Aldi and Lidl, with competition heating up after Lidl ended Aldi's long-running winning streak in July.

Tesco, Sainsbury's, and Morrisons all charged significantly more for the same goods, especially for shoppers without loyalty cards.

Tesco's basket cost £133.38 with a Clubcard and £134.89 without. Sainsbury's came in at £136.79 with Nectar and £139.68 without.

Ocado and Waitrose were the most expensive overall, with average prices of £151.57 and £163.04 respectively.

That means shopping at Waitrose cost £42.58 more than Lidl, which is a 35% increase.

Lidl (with Plus): £120.38

Lidl: £120.46

Aldi: £121.00

Asda: £132.69

Tesco (with Clubcard): £133.38

Tesco: £134.89

Morrisons: £135.41

Sainsbury's (with Nectar): £136.79

Sainsbury's: £139.68

Ocado: £151.57

Waitrose: £163.04

Which? also carried out a separate comparison using a much larger list of 187 items, including more branded goods. In this case, Asda came out on top, offering the lowest prices for the tenth month in a row.

Tesco with a Clubcard came in second, followed by Morrisons with a More Card. Again, Waitrose was the most expensive overall.

Aldi and Lidl weren't included in this larger list, as they didn't stock many of the branded products used in the comparison.

Asda: £469.11

Tesco (with Clubcard): £476.11

Morrisons (with More Card): £481.34

Morrisons: £482.73

Sainsbury's (with Nectar): £486.48

Tesco: £510.80

Ocado: £514.08

Sainsbury's: £521.42

Waitrose: £541.55

The research also highlighted how loyalty schemes can make a noticeable difference.

Based on the longer list, Tesco and Sainsbury's loyalty cards helped shoppers save over 6% during October. However, not everyone can access these discounts.

Which? warned that millions of shoppers may be missing out on loyalty deals due to age restrictions, lack of a permanent address, or limited access to digital devices.

They also added that while supermarket inflation has slowed, grocery prices are still 5.2% higher compared to last year.

The biggest price increases were seen in chocolate, meat and coffee, while items like paper goods and sparkling wine have come down in price.

The price comparisons were carried out using an independent tracking site and included widely available groceries found in all major supermarkets.