Lidl has maintained its position as the cheapest supermarket for essential groceries for twelve consecutive weeks, with a total cost of £13.21 for a basket of eight key items. Aldi follows closely at £13.23, while Asda charges £12.25 for similar products. This weekly price comparison examines the costs across six major supermarkets, including Morrisons, Tesco, and Sainsbury's. Morrisons ranks fourth at £13.40, and Tesco is fifth at £13.60. Sainsbury's remains the most expensive option at £13.63, marking 24 weeks in this position. Both Aldi and Asda have contested the findings, arguing that the products compared do not reflect the full range of their offerings. The comparisons have been ongoing since March 2022, providing insights into the fluctuating prices of essential goods.