James claims in the second more candid photo, Meghan "breaks the formality the most" as she leans forward and is "laughing as she appears to join in the fun with the children in front of her."
The expert said, “Charles is the only royal to have held the same pose between both shots, suggesting a sense of continuity and protocol, although whereas his royal status was being cutely upstaged by little Charlotte in the formal pose it seems she's been budged along for the second to give the Prince and direct heir his rightful place in the group.
“Royal hierarchy is traditionally signalled by space and Charlotte, who looks so much like the Queen when she was a child, clearly has the lion's share of the bench in the first shot.”
Referring to the second picture, in which the Royals look more relaxed, James said: “By the second Charles has been moved along with the future king on his knee so the bigger share of the space is down their end and the birthday boy looks more central to the family uni
“Charlotte is now squeezed in next to Camilla, while Charles still holds his grandson as though he is likely to take off like a rocket at any minute.
“Camilla might look as though she's silently signalling her love to the world via what looks like a heart-shaped gesture with her hands, but this is in fact a steepling ritual that she has been using to calm her visual nerves since she first married Charles.”
James then compares Charles' body language to his wife Camilla's stating, “Camilla looks totally comfortable with little Charlotte” unlike Prince Charles “who is holding George rather awkwardly”.
James finishes, focusing on Meghan and Kate, "With her three children posing in the group Kate looks supremely confident and genuinely happy here, beaming with pride as she clutches baby Louis.