Aldi is officially the UK's cheapest supermarket in September, according to Which? - just beating rival Lidl by 37p. A basket of 22 branded and unbranded goods cost GBP24.03 at Aldi and GBP24.40 at Lidl, which won in August. The Which? research also found Aldi was a massive 38% cheaper than the most expensive supermarket for an equivalent basket of items.
The most-expensive supermarket was Waitrose, where the products cost 38% more than Aldi, at GBP33.06. At Asda the price was GBP26.19, and at Sainsbury's GBP27.95. Morrisons charged GBP28.31 for the goods, tied with Tesco.
Ocado asked GBP29.84 for the items, and Waitrose was the most expensive (GBP33.06).The German discounter was 37p cheaper than Lidl for the same basket of items (Aldi)
What do you think of the rankings? Let us know in the comments below To do the research Which? compared the price of branded items such as Andrex toilet paper, Colgate toothpaste and McVitie's digestive biscuits with own-label products, including mixed peppers and semi-skimmed milk.Waitrose charged 38% more for a similar basket of goods (AFP via Getty Images)
Aldi managing director of buying Julie Ashfield said: "We're committed to providing our customers the best prices possible, and we're immensely proud that we have taken the top spot.
"Being named the UK's cheapest supermarket in September marks our tenth win and we're dedicated to continuing to make life a little easier for our customers." Groceries with some of the biggest price differences included Maltesers and own-brand black grapes, which respectively cost GBP1.51 and GBP1.11 less at Aldi than at Waitrose. Aldi was also the cheapest supermarket in July .Aldi opens checkout-free supermarket where customers just walk out with their food
At the time, the cost of a typical basket of shopping was GBP21.61 in Aldi.
Lidl was 20p more expensive, at GBP21.81. The cost of a shopping basket in Asda was GBP21.99, Tesco GBP24.21 and Morrisons GBP24.40. The most expensive supermarkets were Sainsbury's (GBP24.41), Ocado (GBP26.82) and - unsurprisingly - Waitrose (GBP28.59).Aldi customers threaten to boycott supermarket over new checkout-free store
Groceries with some of the biggest price differences included own-label large free-range eggs, which had a difference of GBP1.06 between Aldi and Waitrose.
Last month The Mirror reported a new store from Aldi trialling no-checkout technology cost GBP1.8million to refit , according to a supermarket insider - and the fancy new technology still makes mistakes. Earlier this week the much-loved German discount supermarket announced it was trialling a store with no checkouts at all. The store works by customers picking up their shopping and being charged as they walk out.Aldi worker at 'secret' checkout-free store spills beans on all the new changes
The scheme is being tested by Aldi staff at a secret London store, but the supermarket would not say where.
But an Aldi worker says the store is based in Greenwich, south London. The worker, who wants to stay anonymous, says the store's new technology cost GBP1.8million. The new no-checkout equipment works, but does still make mistakes when scanning a basket of goods, the worker revealed.Nike warns of shoe shortages that could last until 2022 due to a lack of ships
The employee said: "It does work.
Like all technology its not 100%, and not as many staff [are] needed." Aldi said the no-checkout store would still need as many staff as before. The secret Aldi worker said they thought the initiative would be rolled out around the country.
They said: "The way things are going, in a few year's time all shops will have it, and fewer staff will be needed - but I don't think that's the way forward."Read MoreMorrisons to hire 3,000 new staff to meet the Christmas shopping rushRead MoreSainsbury's hiring 22,000 new staff before Christmas in huge jobs boost