Businessman Denis O’Brien has been granted leave to bring a Supreme Court appeal against the dismissal of a 2020 data protection complaint made by him after the public relations firm Red Flag refused to disclose information held in a dossier about him. In a ruling this week, the court found O’Brien’s case raises “potentially novel issues of great importance” around the scope of litigation privilege and the extent to which personal information concerning a data subject is immune from disclosure. The background to the data complaint and the leapfrog appeal from a ruling of the High Court last February is…