Went into local store today and saw they are doing 3 for 2 on all baby stuff. They had the usual cheapest item is free disclaimer. Decided to stock up and picked up 3 packs of nappy liners (£ 5.25 a pack), 3 tubs of bottom butter (£ 2.89 a pack) and 3 bags of cotton wool (£ 1.25 a pack). When I went to pay, I discovered that the 3 packs of cotton wool were free, and not one of each of the different items. When I complained that this didn't seem fair and that the Boots 3 for 2 groups like items together making it a better deal for the shopper, the supervisor told me that I'd misinterpreted the deal and would have to make 3 separate transactions and LEAVE THE STORE in between the transactions.