Prince Harry and Prince William are both completing their public duties in the U.K. this week, but will the estranged brothers cross paths? Harry, 40, flew into London on Monday, September 8, and there has been much speculation from royal watchers about whether the Duke of Sussex will see his family. Ahead of his Monday appearance at the WellChild awards, Harry visited his late grandmother Queen Elizabeth II's grave at Windsor Castle for the third anniversary of her death. William, meanwhile, was honoring the monarch eight miles away.