Aldi retained its title of the UK's cheapest supermarket in October, according to the latest analysis from consumer group Which?
Which? looked at the cost of a basket of 23 items, including groceries and household essentials, in its monthly cheapest supermarket price comparison.
Aldi come in cheapest at just £24.24 ($32.46) — 73p cheaper than budget rival Lidl. Asda was the third cheapest, with the same shopping coming in at £25.94.
The basket cost £28.31 at Morrisons.
Waitrose was the most expensive supermarket, with the items costing £33.81 — more than £9, or 39%, higher than Aldi.
Items with some of the biggest price differences included own-label seedless grapes and own-label melon, both of which had a difference of £1.11 between Aldi and Waitrose, and PG Tips tea bags, which had a difference of 94p.
Which? also compared a trolley of with 77 items, including a greater selection of branded items that aren’t always available at the discount supermarkets.
In this comparison, Asda was the cheapest, with the items coming to £143.21. Sainsbury's was a close second, with £145.56.
Waitrose was again the most expensive, at £164.91 — £21.70 more costly than Asda.
Read more: UK retail footfall peaks in October
There have been increased concerns about increasing grocery prices in the UK over the past month, due to rising inflation. Like-for-like grocery prices rose by 1.7% in the four weeks to 3 October, compared with the same time last year, according to market analyst Kantar.
"In real-world terms, the average household had to spend an extra £5.94 on groceries last month than they did at the same time last year. The typical household spends £4,726 per year in the supermarkets, so any future price rises will quickly add up," said Kantar spokesperson Fraser McKevitt.
The UK is also struggling with widespread supply chain issues. A shortage of HGV drivers has led to items disappearing from supermarket shelves across the country due to delivery difficulties.
Supermarket bosses have advised customers to shop early for Christmas but urged people not to panic-buy.
Tesco chief executive Jason Tarry said in October: "Our stock levels are good, so there’s no need to buy more of your regular groceries than normal.
"And as the festive season approaches, it’s always busier for our stores, so please consider shopping a little earlier than you usually would, to avoid the peak festive period."
"There won’t be the same level of choice as there has been in the past," Co-op chief executive Steve Murrells said in September.