Britain's Prince Charles (left), Prince of Wales, Britain's Prince William, Duke of Cambridge, Britain's Catherine, Duchess of Cambridge, Meghan, Duchess of Sussex and Britain's Prince Harry, Duke of Sussex arrive for the Royal Family's traditional Christmas Day service at St Mary Magdalene Church in Sandringham, Norfolk, eastern England. Paul Ellis/AFP

LONDON: Britain's royals unveiled a new protocol on Monday for users of their social media channels, asking for kindness and warning of possible police action following a rise in abusive comments, often aimed at Prince Harry's pregnant wife Meghan.

Abusive and even threatening remarks have become commonplace on the comment sections and Twitter feeds of the royal family, with Kate and Meghan, the wives of Queen Elizabeth's grandsons Prince William and Harry, particular targets.

Unveiling their "Social Media Community Guidelines", Buckingham Palace, Clarence House and Kensington Palace – the offices for the queen, her son and heir Prince Charles, and William and Harry – outlined what behaviour they expected from users of their channels.

Britain's Prince William (left), Duke of Cambridge, Prince Harry, Duke of Sussex, Meghan, Duchess of Sussex and Catherine, Duchess of Cambridge arrive at Westminster Abbey to attend a service to mark the centenary of the Armistice in central London. Paul Grover / AFP