I laid out the board for a game of Settlers of Catan with the Duke and Duchess of Cambridge, and related to Prince William the details of a memorable day two decades earlier.

‘Due to summer flooding, we had to take the long route north after visiting friends in Aberdeen. This brought us close to Balmoral. At one point on a single track round, a black Range Rover pulled into a passing place to let us through. We recognised members of your family in the car – especially your brother Harry, whose red head was sticking out a back passenger window.’