Princess Anne could approach her role in the same way as her Prince Philip, the expert continued.
She told Express.co.uk: “Princess Anne is very much the chip off the old block as far as Philip is concerned and their body language throws up many more similarities, suggesting a very like-minded approach to life and being part of the Firm.
“Like her father, Anne appears to be someone stoic and dependable but also unfussy and upbeat as a companion.
“Also like Philip, Anne often looks on the brink of a wry and slightly cynical smile and this more down-to-earth and even irreverent approach should be exactly what the Queen needs to keep her happy and grounded.”
Her similarities to Prince Philip in public could give a glimpse into her working relationship with the monarch.
Princess Anne’s body language with the Queen suggests she took on a similar public role with the monarch as her father had, Judi added.
“Princess Anne has always been both the closest and the most similar in terms of personality to her father Prince Philip,” she continued.
“Her low-key, unfussy, immensely solid role in the Queen’s public life makes their relationship look similar in many ways to that between the Queen and her husband.
The royal women even paired up virtually during the coronavirus crisis for virtual engagements.
Princess Anne and Queen Elizabeth II also have shared interests away from their official duties.
She stated: “Both women share a passion for horses and, off-duty, they will often dress in identical, countrywomen-style, tweeds, wellies and headscarves.
“If the Queen hadn’t inherited the crown it’s likely it would be Anne’s lifestyle that she would have most love to embrace, although the Queen does seem to have a soft spot for some of the glamour of royal life that is apparently an anathema to her daughter.”
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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.