A new royal biography has sparked discussion after suggesting that one decision made by the late Queen Elizabeth II could ultimately be viewed as a lasting mistake in her reign.

According to royal author Robert Hardman, the late monarch’s handling of the situation involving her son, Prince Andrew, remains one of the most controversial aspects of her final years.

The comments appear in his new book Elizabeth II: In Private. In Public. The Inside Story, which examines key moments from her 70-year reign.

Hardman suggests that the Queen’s instinct to protect her son during the fallout from his association with Jeffrey Epstein may have influenced decisions that continue to be debated today.

One of the most widely discussed points is her reported involvement in supporting Andrew during his civil settlement with Virginia Giuffre, a case in which he denied wrongdoing but later settled out of court.

The biographer argues that while the Queen was widely respected for her leadership and sense of duty, this particular episode may stand out differently over time as public scrutiny continues.

However, other royal commentators in the same reporting stress that her reign was defined far more by stability, diplomacy, and endurance through decades of national and family challenges.

The discussion comes as the royal family continues to navigate the long-term impact of Andrew stepping back from public duties and losing royal patronages.

The biography does not diminish her broader legacy, but highlights how even the most influential monarchs can leave behind decisions that are later reassessed.