King Charles has a "loving but detached" relationship with his two sons, Prince William and Prince Harry, a royal expert said.
In 1952, when Charles was just three years old his mother, Elizabeth II, acceded to the throne - making him the heir apparent, a huge position to hold at such a young age.
As the head of state, it came with a busy schedule for the late Queen Elizabeth with royal duties and engagements taking place across the globe - all at the same time as having a family.
It is known that the Queen was often away from her four children for long periods of time, including while they attended boarding school.
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