When the woman contacted Tesco to complain, the company representatives concluded that it wasn’t their job to break the bad news that her husband was cheating on her, and went for the tactful white lie. ‘Indeed, madam? A computer error? You’re quite right, that must be the reason. We are so sorry for the inconvenience.’ Fry tells me that this is now the rule of thumb at Tesco: apologise, and blame the computer.