Royal Substitution: Prince Edward and Sophie Fill in for King Charles at Buckingham Palace

The Duke and Duchess of Edinburgh stepped in for King Charles at a historical event marking a diplomatic agreement between France and the United Kingdom, as the king continues medical treatment for undisclosed cancer. The event included the inspection of troops from both nations and the switching of roles during the Changing of the Guards ceremonies outside Buckingham Palace. King Charles recently made a surprising comment about his marriage during a public engagement, acknowledging his wife's support in his recovery.