Harry and Meghan were reportedly not told Prince Andrew would move into Frogmore after being evicted from their official UK residence.
King Charles is claimed to have made the decision to remove the couple from the royal residence within hours of Harry's memoir Spare being released, which revealed intimate details of his crumbling relationship with the family.
The Duke and Duchess of Sussex have confirmed they had been asked to hand over the keys, but sources say they were not told the property would be offered to the Duke of York.