The royal couple paid tribute to the late Prince Philip during their surprise visit. If you don’t know, the Duke of Edinburgh served as the Air Commodore-in-Chief of the Air Training Corps for 63 years until 2015. After stepping away, he handed his title to Duchess Kate, who became Honorary Air Commandant.
The funeral was held this past weekend and Prince William, Duchess Kate, and the rest of the immediate royal family attended (including Prince Harry, who flew in from California.)
If you don’t know, a lip reader actually was able to reveal what Prince William and Prince Harry said to each other after the funeral.