The Queen acted to "avoid the royal family being tainted" after Meghan Markle and Prince Harry "crossed a red line" when departing from duties, a royal expert has claimed.Royal biographer Angela Levin claims the Monarch is a "patient woman" but was bound by her sense of duty when it comes it royal decisions.It comes as the Queen today released a statement saying that the Duke and Duchess of Sussex won't be returning to their royal duties after a year-long Megxit trial.The Buckingham Palace