Tesco Long Life Milk 24p for a litre. Semi skimmed and whole milk only be careful skimmed scanning at 90p even though the shelf said 24p, store would not honour it as barcode didn't match (got it voided) however they confirmed 24p is correct for semi and full fat.

This was at St Austell store not sure if national.

Yes I know 24p is a stupid price for milk please don't kill me over it, just posting as a deal, I'm not sure what the farmers get could be a loss leader.