"The Princess was persuaded to hire royal nanny Barbara Barnes and took it badly when William ended up adoring her."
Nicoll adds, "There was a side of Diana that was rather jealous of the nannies and the relationships that they subsequently struck up with the children.”
According to the documentary, Diana dismissed Barnes from her role when William was barely four.
Later, after Diana and Prince Charles' separation, the Princess of Wales came to deeply resent Tiggy Legge-Bourke, whom Charles hired to help with the boys.
As William and Harry grew up, the Diana stressed the importance of compassion and humility by leading them by example.
She kept them out of the public eye as best she could and tried to keep their undeniably unusual upbringing as normal as possible.