Prince Harry shared a terse response after his first day in court, following his return to the U.K. for a trial against a major British publisher.

The Duke of Sussex arrived at the British capital's High Court on Monday, where he alleges "grave breaches" of his privacy.

Unless a settlement is reached, as happened in the case against News Group Newspapers, Prince Harry will be in the High Court pursuing his claim against what he sees as the unfair and dishonest excesses of press intrusion. It's a cause that is close to his heart.

Harry’s various legal issues and trials have been the primary cause of the breakdown in the relationship between Charles and Harry,” one royal expert said.

The Duke of Sussex and co-claimants, including Sir Elton John, actor Elizabeth Hurley and racial justice campaigner Baroness Doreen Lawrence, allege that Associated Newspapers (ANL), publisher of the Mail titles, systematically engaged in “unlawful information gathering” between 1993 and 2011.

Prince Philip gave Prince Harry a stern warning after his 2018 wedding. Keep reading for the details…MORE: Follow Wonderwall on MSN for more top news _Prince Harry became the Duke of Sussex when he married Meghan Markle,

Prince Harry appeared in the U.K. on Monday, January 19, for a court appearance, where he looked like he was losing more of his hair.