UK grocery inflation sticks at 4.3% in March, says Worldpanel
31/03/2026 08:00
Iran war expected to drive up food inflation further UK grocery sales up 4.4% in 4 weeks to March 22 Tesco and Sainsbury's win market share over 12 weeks Asda still losing share By James Davey LONDON, March 31 (Reuters) - UK grocery inflation held at 4.3% in the four weeks to March 22, researcher Worldpanel by Numerator reported on Tuesday, maintaining pressure on consumers ahead of an expected further rise in food prices due to the Iran war. The Worldpanel data provides an early indication of pricing pressures in March ahead of official UK data on April 22. It said prices were rising fastest in markets such as unprocessed meat and coffee and falling fastest in butter and sugar confectionery. The first clear increase in prices paid by UK households due to the Iran war's impact on energy prices has been felt by drivers at the fuel pumps, while farmers have warned of higher food prices from next month, starting with tomatoes, cucumbers and peppers, which are grown in heated greenhouses. Farmers have also said the soaring cost of fertiliser will eventually impact food prices. Worldpanel said each additional 1% on the rate of grocery inflation could add over 50 pounds ($66) to the average household's annual bill. "With grocery inflation likely to increase and fuel costs rising sharply, the conditions that make shoppers feel vulnerable are only intensifying," Fraser McKevitt, head of retail and consumer insight at Worldpanel, said. Britons are already facing a jump in a raft of household bills in April, including council (local) taxes, water, mobile phone and broadband contracts. Separate data on Tuesday from the British Retail Consortium showed overall shop price inflation edged up to 1.2% in March. Worldpanel said UK grocery sales rose 4.4% over the four weeks year-on-year. It said that over the 12 weeks to March 22 industry leader Tesco TSCO.L and number two Sainsbury's SBRY.L continued to win market share. Discounter Lidl GB remained the fastest growing bricks-and-mortar grocer, while online supermarket Ocado OCDO.L remained the fastest growing overall. Number three player Asda continued to lose share. UK supermarkets' market share and sales growth (%)
| Market share 12 weeks to March 22 2026 | Market share 12 weeks to March 23 2025 | % change in sales (year-on-year) | |
| Tesco | 28.0 | 27.7 | 5.0 |
| Sainsbury's | 15.6 | 15.3 | 5.5 |
| Asda | 11.6 | 12.1 | -0.9 |
| Aldi | 10.6 | 10.8 | 2.3 |
| Morrisons | 8.3 | 8.4 | 2.3 |
| Lidl | 8.3 | 7.8 | 9.6 |
| Co-operative | 5.1 | 5.4 | -1.7 |
| Waitrose | 4.7 | 4.6 | 5.8 |
| Iceland | 2.3 | 2.4 | 2.3 |
| Ocado | 2.2 | 2.0 | 12.3 |