As of 1 Oct 2026, the biggest grocery price gap in the UK for 28 Sept – 4 Oct 2026 is Oral B Advanced Enamel Strengthening Toothpaste — 61% cheaper per 1L at Sainsbury's than Tesco (£36.67/1L vs £93.33/1L).
Prices updated 1 Oct 2026
Biggest grocery price gaps — week 40, 2026
28 Sept – 4 Oct 2026. The 10 grocery items with the widest per-unit gap between the cheapest supermarket in the UK and the next one. This week's list is frozen as it stood at the end of the week.
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Oral B Advanced Enamel Strengthening Toothpaste
£36.67/1L
Sainsbury'svs£93.33/1L
Tesco£2.75 total · per 1L−61%cheaper
