During these outings, body language expert Darren Stanton claimed the royals have looked slightly distracted when together.
He said: “In one really interesting picture Princess Anne is not making eye contact with Zara.
“Her position is very rigid and stoic. I do not feel there is a great deal of rapport happening here.
“If you look at Princess Anne and Zara’s feet positions, it is quite telling.
“It shows that Anne wants to disengage and go in the other direction.”
Princess Anne is a working member of the Royal Family whereas Zara is not.
Her senior role could be the reason why Princess Anne looked more “cautious” in public.
“One picture shows Princess Anne flashing a genuine smile,” Darren said.
“The emotion that the human face demonstrates most of all is a smile.
“We smile from when we are anxious to when we are embarrassed.
“But in this picture, the whole face is engaged and clearly the two are enjoying the moment.”
The royal line of succession – who outranks who?
The line of succession to the British throne dictates the order in which each member of the Royal Family would ascend to the throne.
It is also seen as a ranking of importance with the head of the line, the Queen, taking the place of ruler.
Older children come before younger children. Traditionally boys came before girls, but this law was changed on 26 March 2015 before the birth of Prince William’s first child.
Incredibly, Catholics are still excluded from the line of succession, as are children born outside of wedlock.
The royals, who usually stick to a strict protocol when appearing in public, often arrive at events in ascending order of importance, with the most important royal arriving last.
Prince Charles, 72, is currently first-in-line to the British throne, followed by Prince William, 38, his oldest son.
Then comes Prince William’s children, George, seven, Charlotte, five, and Louis, two, and they are followed by Prince Harry, 36. Prince Harry is succeeded by his son Archie Harrison, born in May 2019.