Grocery market share in Great Britain 2017-2022
Prior to the popularity of the discounters, the grocery retail market was dominated by the 'big four' supermarkets: Tesco, Sainsbury's, Asda, and Morrisons. On the back of the post-Brexit uncertainty and growing inflation, consumer behavior has shifted in favor of cheaper alternatives such as Aldi and Lidl. In September 2022, Aldi took over fourth place in the grocery store ranking from Morrisons for the first time. In December 2022, however, Aldi and Morrisons stood in joint fourth place in the ranking, with a market share of 9.1 percent each.
During the coronavirus outbreak, Ocado, Symbols & Independents, The Co-op, Iceland, and other outlets managed to increase their share of the market the most. Asda was especially hard hit and lost almost a percent of its market share from March of 2020 to May 2020.