Although the OK! versus Hello! battle has been bracketed with other landmark cases concerning the developing law of privacy, it is, strictly speaking, about commercial confidentiality.
What the Law Lords were asked to decide was this: Did Hello magazine breach commercially confidential information in publishing unauthorised photos of the wedding of Michael Douglas and Catherine Zeta Jones? By a majority of three-to-two, they decided that it had. Delivering the lead opinion, Lord Hoffmann said that OK!