Overview
- Which?’s latest tracker of about 25,000 supermarket items shows seasonal chocolate is costing more while products get smaller, creating steep price-per-gram increases.
- The analysis compares three-month averages from December 2025 to February 2026 with a year earlier and finds overall food and drink inflation at roughly 3.9%.
- A standout example is a Galaxy extra-large egg at Asda shrinking from 252g to 210g while rising from £4.98 to £5.97, equating to a 44% jump per gram; the same product at Tesco rose 40% per gram.
- Mars Wrigley cites sharply higher cocoa costs and other pressures, says it aims to absorb increases where possible, and notes final shelf prices are set by retailers; Tesco highlights Clubcard prices in response.
- Which? advises checking unit prices to compare value and says discounters such as Aldi and Lidl often undercut rivals, while premium own-label ranges have risen faster than budget and branded lines.