Queen Elizabeth said on Tuesday the British royals were saddened by the challenging experiences of her grandson Prince Harry and his wife Meghan and promised to privately address revelations about a racist remark about their son.<br /><br />Meghan and Harry's tell-all TV interview with Oprah Winfrey aired on U.S. television on Sunday has plunged the monarchy into its biggest crisis since the 1997 death of Harry's mother Diana.<br /><br />In the two-hour show, Meghan accused Britain's royal family of raising concerns about how dark their son Archie's skin might be and ignoring her pleas for help while she felt suicidal.