The Duke of Sussex and the former Labour deputy leader Tom Watson are the last two claimants still suing

An extraordinary personal legal battle which has been years in preparation is to pit one of the most famous members of the British royal family against the world’s best-known media baron this week. On Tuesday Prince Harry’s lawsuit against Rupert Murdoch’s newspaper group, owners of the Sun and the now defunct News of the World, will officially begin at the High Court in London.

Fifth in line to the throne, King Charles’s younger son lives in self-imposed exile in California, but is due to appear in court in person once the case gets fully under way next month. The Duke of Sussex, 40, is suing News Group Newspapers (NGN), over claims that journalists on his popular titles worked unlawfully with private investigators, delving into his private life, between 1996 and 2011. He sees himself as the last man standing in a struggle to get the newspapers to take legal responsibility for the crimes he and others have alleged. Another surviving case brought by Lord Watson, the former Labour deputy leader, will be heard alongside the Prince’s.