... out a phone number, but Tesco.com will not accept registration without one. The firm says this is so it can call if a delivery is delayed or an item is unavailable. In one case, a 15-minute conversation with a customer who made it clear he was annoyed at being called ended with the researcher asking: "I guess you'll be saying no to the next question, but would you mind being contacted by Tesco about special offers in future?" After a complaint, and more than a month spent finding the cause, one of Tesco's head office staff called the customer to apologise and explain. "There should have been an opt-out filter, which wasn't applied to the agency in question," she said. "This is what allowed some customer names to slip through the net." The law is not working well because half of UK businesses are breaking the new Data Protection Act. According ...

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