King Charles has said the Commonwealth can be a force for unity in a "fragmented world" in a message at the annual Commonwealth Day service in London. The King and Queen, the Prince and Princess of Wales, and Princess Anne attended the event at Westminster Abbey, which was the biggest gathering of senior royals since the arrest of Andrew Mountbatten-Windsor last month. Anti-monarchy campaigners, Republic, staged a protest near the Abbey with placards reading "What did you know?", in reference to former prince Mountbatten-Windsor's links to sex offender Jeffrey Epstein. More than 1,800 guests attended the service, which featured readings, prayers, music and dance, from celebrities including former Spice Girl Geri Halliwell-Horner and Strictly Come Dancing's Oti Mabuse. Senior politicians, including Prime Minister Sir Keir Starmer, were part of the congregation, alongside religious leaders and representatives of Commonwealth nations.…