Tesco and Sainsbury’s customers are paying more than Waitrose shoppers for some common branded groceries if they are not using a loyalty scheme, analysis by Which? has found.
The watchdog compared a list of 245 branded items including Heinz, Nescafe and Mr Kipling in February, finding that it was, on average, most expensive for customers at Sainsbury’s and Tesco who were not using the Nectar or Clubcard loyalty schemes.
