At 9pm there was no person working on the non self service check out tills. I went to customer service to try & check out there . At the time there was nobody else shopping there but I was told that you have a rule that the basket can not have more than 5 items. I don't like self service after a long days work. I believe in such circumstances, Sainsbury's need to change the rules to allow the person at Customers Service to have the discretion to check out a customer with a full basket. The staff are nice & the situation is not their fault. The rule on 5 items is wrong when not accompanied with discretion.