Britain's Prince Harry, Duke of Sussex, arrives at Westminster Abbey in central London on May 6, 2023, ahead of the coronations of Britain's King Charles III and Britain's Camilla, Queen Consort. (PHOTO / AFP)

LONDON — The publisher of Britain's Daily Mirror tabloid apologized to Prince Harry on Wednesday for ordering the unlawful gathering of information, court documents showed.

In documents presented at court as part of a phone hacking trial, Mirror Group Newspapers, which is owned by Reach (RCH.L), admitted on one occasion a private investigator had been engaged to unlawfully gather evidence about King Charles's younger son at a nightclub.

READ MORE: Tabloid apologises to Prince Harry at start of phone-hacking trial

It said it "unreservedly apologises and accepts that (Harry) is entitled to appropriate compensation".