Speaking exclusively to Express.co.uk, body language expert Judi James analysed some of their outings.

The expert highlighted an engagement the royal women attended just months after Camilla’s wedding.

In June 2005, the royals sat together in a carriage for Trooping the Colour.

While physically close, Judi claimed their body language revealed a “distance”.

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She said: “Riding together in the carriage, Camilla and Sophie look like two women who might be close in terms of proximity but distant in terms of a lack of engagement.

“Their non-verbal signals could hardly be more contrasting.”

As well as being distant from each other, the expert commented on the opposing ways they interacted with royal fans.

Judi added: “Sophie is looking hugely sociable here, beaming at the crowds with one hand raised in a ‘hail’ wave, with the palm flattened to signal a very friendly approach.

Both Sophie and Camilla appear to have formed close relationships with their royal in-laws.

Judi claimed their apparent lack of closeness with each other may come as a surprise.

She concluded: “It’s difficult to imagine the very sociable and approachable Sophie Wessex not getting on with any other members of her family.

“But the body language in some shots of her attending events with Camilla does suggest an air of coolness could exist between the two women.”

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 March 26, 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, 39, his oldest son.

Then comes Prince William’s children, George, seven, Charlotte, six, and Louis, three, and they are followed by Prince Harry, 36. Prince Harry is succeeded by his son Archie Harrison, born in May 2019.