LONDON, Jan 20 - Prince Harry suffered a sustained campaign of attacks for standing up to Britain's powerful Daily Mail over intrusion into his private life, his lawyer told a court on Tuesday where he and others are suing the paper's publisher.

The Duke of Sussex, 41, and six other claimants including singer Elton John are suing the Mail's publisher Associated Newspapers at the High Court for violations of their privacy over more than two decades from the early 1990s.