Prince Harry tabloid lawsuit opened Monday at the High Court in London. He joined Elton John and other public figures in court.
The claim targets Associated Newspapers Ltd, publisher of the Daily Mail titles. The group alleges unlawful information gathering over many years.
Harry said the alleged actions damaged relationships and caused severe emotional stress. He described feeling isolated and deeply suspicious of others.
Elton John and his husband David Furnish also submitted witness statements. They said privacy breaches left them feeling violated and unsafe at home.
The claimants accuse the publisher of intercepting voicemails and listening to calls. They also allege deception to obtain private data.
Lawyers said investigators accessed travel records, bank details, and medical information. They also alleged the destruction of records to hide evidence.
Associated Newspapers rejected the claims. The company called the allegations exaggerated and unfounded.
Harry returned to Britain for the hearing. He plans to give evidence later this week. This case marks his final legal battle against UK publishers.
Other claimants include Liz Hurley and Doreen Lawrence. Several witnesses will testify during the coming weeks.
The case could shape future standards on press conduct and privacy rights.
