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Which was the cheapest supermarket in September 2019?

Waitrose was the most expensive supermarket for the seventh month in a row, but which supermarket was best value?

Asda was the cheapest supermarket in September, for the second month in a row. Which? analysed a basket of 66 popular branded groceries across six supermarkets – and at Asda the shopping cost £129.50.

Taking the position of most expensive supermarket for the seventh consecutive month was premium supermarket Waitrose. The same basket of groceries cost £143.85, a substantial £14.35 more than Asda.

Sainsbury’s (£132.97) was in second place, followed by Morrisons (£135.85).

Supermarket giant Tesco was the fourth-cheapest supermarket in September 2019, placing it firmly in the middle of high-end and cheaper competitors, a spot it’s occupied for eight out of the nine months we’ve looked at so far this year.

Below we explain how we work out the cheapest supermarket, and sum up the latest supermarket news.


How we compare supermarket prices

Using data from independent price comparison site MySupermarket.com, we calculate the average price (including special offers but not multibuys) for a basket of popular branded items.

In September, the basket contained 66 products, including Andrex toilet tissue, Branston baked beans, Knorr vegetable stock cubes, Lurpak Spreadable (Unsalted) butter, McVitie’s Hobnobs and PG Tips tea bags.

It also included everyday essentials like toothpaste and cleaning detergent.

We tracked the price of each item throughout the month at six supermarkets to calculate an average and reveal the cheapest and most expensive places to shop.

We compared prices at:

We’re unable to include Aldi or Lidl because our price comparison is based on data from supermarkets’ websites, and these shops don’t sell branded groceries online.


To find out which supermarkets combine value for money with top-notch produce, see our full list of supermarkets compared.


Latest supermarket news

Aldi set to double London stores

German discounter Aldi has announced plans to invest £1bn in expanding the number of stores it has in London over the next two years, following an 11% increase in sales to £11.3bn in 2018.

It plans to increase the number of London branches from 45 to 100 by the end of 2025, and to open a further 100 stores across the UK.

Tesco axes discount store

A year after debuting Jack’s, its first budget store, and having since opened nine more branches, Tesco has announced that it will close its Rawtenstall (East Lancashire) branch.

The ill-fated shop will be replaced by a 40,000sq.ft Tesco store instead.

Asda ready meals in recyclable packaging

Asda is launching a new ready meal range in November that will come in full recyclable packaging, in its latest move towards sustainability.

The supermarket claims the move will change 775 tonnes of plastic and 45m ready meal trays from non-recyclable to recyclable material.

It also announced in September that its range of Aberdeen Angus steaks would no longer be sold in black plastic trays, switching instead to fully recyclable cardboard packaging.

Iceland announces plastic-free Christmas range

In 2018, Iceland made headlines with its palm-oil focused Christmas advert. This year, the frozen-food specialist is set to launch a plastic-free range of Christmas menu options including starters, mains and desserts.

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