This makes Princess Anne the hardest working royal family member for the fourth straight year, and despite her sustaining a significant head injury over the summer.

Princess Anne once made a harsh eight-word remark about a documentary made on the Royal Family. The Princess Royal, now 74, featured in a documentary of the Royal Household called Royal Family, commissioned by the BBC and ITV in 1969.

Queen Camilla was presented with an Honorary Doctor of Literature by the Princess Royal at the University of London on Wednesday evening. The Queen joined four eminent awardees in receiving an Honorary Doctorate from the University's Chancellor,

Princess Anne outdid every other member of the Royal Family and carried out the most engagements this year, with King Charles coming in second, despite his cancer diagnosis.

For four years running, the Princess Royal has taken the lead when it comes to the number of royal engagements undertaken annually

Did you know that Princess Anne had a successful career as a competitive equestrian? In younger days, the Princess Royal even represented England in the sport at the Olympics.