Dairy and eggs
Products sold by more than one chain come first.
Nothing here yet: this category is read in turn with the others, so it may still be on its first pass.
Products sold by more than one chain come first.
Nothing here yet: this category is read in turn with the others, so it may still be on its first pass.
Online prices: we read each chain's shop every day or two. The shading fills in quarters under 1, 2, 4 and 7 days; empty means we have not seen the price for over a week.
Prices seen in a store (from shoppers' photos and Open Prices) are seen once, so they drain more slowly: under 3, 7, 14 and 30 days; empty after a month.