They said: “He can be difficult. He is a driven person and that can make him impatient.”
The insider also said that while King Charles III is more relaxed compared to his heir, this can make William even more stressed.
According to Page Six, the source told Jobson: “That can make William short-tempered when dealing with Charles.
“The Boss (Charles) has a temper, too, but it does not go on and on. He can get frustrated and flare up and then, in an instant, it is forgotten about. With William, it is rarely forgotten.”
Jobson also noted in the extract that Charles “knew” that Prince Harry and William were both “strong-willed, stubborn even”, and that “conflict would be very difficult to manage and could have a detrimental impact on the monarchy itself”.
He added: “Sometimes the level of belligerence between his sons, and indeed towards him, has shocked Charles.”