Queen Elizabeth has vowed she will never abdicate.
But it has been suggested that plans are in place for Queen to step aside if she is still on the throne at 95, allowing Prince Charles to assume power.
Palace sources have indicated to the Mail on Sunday that the monarch, who is now 91, may ask for the Regency Act to come into force at that point.
This would see Charles assume the title of Prince Regent and carry out the duties of the monarchy meaning he would be king in all but name.
If the Queen made the decision to enforce the act it would see her effectively retire, much like the Duke of Edinburgh, who at 96, stepped back from royal duties last month. Read more