He noted a funny interaction she previously had with a member of the public whilst in the US: “In Los Angeles she gave a speech at a convention when somebody shouted, ‘I love you Fergie,’ and she replied ‘I’ll get your number later!”
Arthur also wrote about Sarah’s “mistakes”, writing: “…like the 1992 “toe-sucking” incident in the south of France with her Texan millionaire financial advisor John Bryan, but she just couldn’t cope with being bossed around by the men in grey suits at the Palace and decided to leave the Royal Family.”
After officially joining the Royal Family through marriage in 1986, Sarah’s separation from the late Queen’s second-born son, Prince Andrew, was announced in 1992.
The couple’s divorce was not finalised until 1996, a decade after their wedding day, but the pair still remain close.
Discussing the former couple, he wrote: “…She will always be there for Andrew.
“…Sarah and Andrew are still very close and will be until the day they die.”
The former couple – who share two daughters – also still live together at the Royal Lodge in Winsdor.