Prince Harry is suing Mirror Group Newspapers over phone hacking

His lawyer claims the media used illegal methods to gather information about Prince Harry

Prince Harry was unable to testify on the first day due to prior commitments

This is the first of Prince Harry's legal cases against the media to go to trial

Prince Harry will discuss the impact of media harassment on his life and those around him

Prince Harry's lawyer argues that phone hacking was widespread

The articles involve personal relationships, drug experiences, and other details about Prince Harry

The trial covers articles from Prince Harry's 12th birthday and includes various aspects of his life