List of supermarket chains in the United Kingdom

This is a list of supermarket chains in the United Kingdom. Grocery sales in the UK are dominated by Tesco, Asda, Sainsbury's and Morrisons. These, dubbed the 'big four', had a combined market share of 73.2% of the UK grocery market in the 12 weeks ending 4 January 2015, a decline from 74.1% in 2007. Discounters Aldi and Lidl have seen a combined rise in market share from 4.8% to 8.3% over that time, while upscale grocer Waitrose's share rose from 3.9% to 5.1%. As of KANTAR data published on 24 March 2019, the market share is dominated by Tesco, with Asda being second, Sainsbury's third and Morrisons fourth.
The London Co-operative Society opened Britain's first fully self-service store in January 1948 in Manor Park, London. Premier Supermarkets, a subsidiary of Express Dairies, opened the UK's first supermarket in Streatham, South London in 1951. In early 2017, Tesco announced a deal to merge with Booker, the UK's largest wholesale food retailer, while Aldi became the 5th biggest supermarket.
List of defunct UK supermarket chains.
These supermarkets are either no longer trading, have been renamed, or have been taken over and rebranded.
Waitrose effect.
Proximity to a supermarket has been widely reported to be an amenity that can have a significant effect on residential property prices in Britain. Beginning under Andy Hulme and continuing under Mike Songer, the home mortgage unit of Lloyds Bank has published pricing research that examines the premiums commanded by homes in a given neighbourhood against comparables in the same post-code and correlates the difference in price with convenience of access to the various supermarkets. The following table averages information from neighbourhoods across England and Wales, compiled by Lloyds Bank for their 2016 report using supermarket location information from CACI Datalab and house price information from the UK Land Registry.