If there's one thing we know for sure during the cost of living crisis, it's that supermarkets are keeping track of each other's prices.
With retailers desperate to grab our custom and shoppers keener than ever to seek out the best prices, they're keeping a closer eye on the competition than ever before.
What that means in reality though is that when one increases the price of a product, the others will quickly follow suit - especially now that we have Tesco and Sainsbury's both with their own Aldi Price Match schemes.