The Crown depicts royal protocol war between King Charles and Queen Elizabeth II

The fourth episode, titled Aftermath, showed how the Royal Family navigated the death of Diana, Princess of Wales.

Robin Janvrin, the then-deputy private secretary to Queen Elizabeth II, is portrayed by Jamie Parker in the final season of The Crown.

WATCH NOW: The Crown's sixth season drops today

He told the late Queen during a scene set at Balmoral Castle the day after Diana's death: "The princes are now awake. And, I believe, the Prince of Wales has broken the news.

"His team have made a request to have an aeroplane of the Queen's Flight made available."

Imelda Staunton, who played the late monarch, responded: "What for?"

Janvrin said: "To bring the princess back from Paris in accordance with arrangements set up under Operation Overstudy."

Prince Philip, depicted by Jonathan Pryce, quipped: "No, those plans are for a royal death abroad.

"Diana was no longer royal, no longer HRH. We must be seen to be doing this by the book."

The deputy private secretary claimed: "Indeed sir, and I suggested as such myself to the Prince of Wales.

"To which he asked if we would prefer the mother of the future King of England to be brought back in a Harrods van."

The late Queen Elizabeth II eventually nodded her head in agreement.

In a later scene in The Crown, King Charles continued his protocol war with his mother.

King Charles, who was then the Prince of Wales, told his parents after returning from Paris: "I do think it's important that senior members of the family keep an eye on the mood out there."

The late monarch commented: "I thought we might concentrate on the mood here and taking care of this family."

Charles resisted that notion, saying: "Diana was part of this family." The late Queen disagreed, adding: "Divorced from this family."

LATEST ROYAL NEWS:

• The Crown infuriates viewers minutes into new series with 'terrible' scene
• Princess Eugenie interviews Prince Louis' favourite pop band
• Princess Diana rejects Dodi Fayed's proposal in The Crown

Prince Philip agreed: "A legal severance, an amputation that you fought so hard for."

Queen Elizabeth II, portrayed by Staunton, continued: "Not us. We all wanted her to remain in this family. But you insisted on divorce."

The late Duke of Edinburgh then said: "Which is why this is now a Spencer family matter. And why we are keen to protect their wishes for a small, private family service."

The Royal Family eventually agreed on having a public televised funeral for the late Princess of Wales, which took place at Westminster Abbey on September 6, 1997.