Watch the moment Donald Trump and Melania arrive at Windsor Castle, where they are greeted by the Prince and Princess of Wales.

The pair step off Air Force One to be immediately greeted by royalty, before heading over the grounds to see King Charles and Queen Camilla.

GB News’s Royal Correspondent says Princess Kate took on a “very diplomatic role” after a “difficult year” for the future Queen.

“This is the informal mingling ahead of the formal carriage procession which will take place very shortly”, Cameron described.