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    1. Celebrity
    2. Royals

    Royal Biographer Reveals Queen Elizabeth's 1969 "Flu" Was a Cover-Up for a More Serious "Breakdown" Over a Major Event

    Author Robert Hardman says a palace source later admitted to the lie.

    Kristin Contino#039;s avatar
    By Kristin Contino
    Published 8 April 2026 In News

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    Queen Elizabeth looking at a crown inside a glass case
    (Image credit: Getty Images)
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    Although Prince Charles was named the Prince of Wales when he was nine years old, he wasn’t officially invested into the role until 1969 at the age of 20. The lavish televised ceremony, held at Caernarfon Castle in Wales, “was going to be like a sort of coronation mark two,” royal biographer Robert Hardman said on the Daily Mail’s “Palace Authorised” YouTube show. But terrorist incidents leading up to the investiture caused Queen Elizabeth so much distress that Buckingham Palace created an elaborate excuse for her to cancel all of her public appearances in the days following, according to Hardman.

    The royal columnist shared that “there was this sort of nascent terrorist movement” in Wales at the time. Welsh separatists intended to disrupt the event by planting bombs across the region, including one that prematurely exploded and killed two of the terrorists just hours before the ceremony.

    Calling it “a very tense moment” that put a huge amount of “pressure” on Queen Elizabeth, the author continued, “I think she was really worried that something was going to happen.”

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    Queen Elizabeth standing next to Prince Charles, wearing a cape and crown, at his Prince of Wales investiture

    Queen Elizabeth stands with Prince Charles during his investiture as Prince of Wales on July 1, 1969.

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    “She’d always taken a view that if stuff happens to me, okay, I’ll live with it, I’ll die with it. It went with the territory,” the author explained. “But this was the threat of terrorism against her son, and against his event and against the family.”

    The late Queen found the terrorism threats so upsetting that she backed out of all her planned events soon after, including the 1969 Wimbledon finals. “The Queen went back to London and returned to her bed, and canceled all the engagements for the following week. Very, very unlike her,” Hardman noted.

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    “The palace put out that she was suffering from flu, which was an odd thing to be suffering from in early July,” he continued. Hardman said that a source close to the late Queen admitted to him that there was no illness, but instead Her Majesty was suffering from “nervous exhaustion.”

    People sitting outside a castle as Prince Charles is invested as Prince of Wales

    Prince Charles kneels before his mother during his investiture as Prince of Wales.

    (Image credit: Getty Images)

    “I don’t know if we could call it a full nervous breakdown, because she was back on duty just over a week later, but it was the nearest thing to a nervous breakdown,” Hardman revealed.

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    Decades later, Prince William opted not to have a formal investiture in Wales, with Kensington Palace stating that he prefers to follow a more modern approach and develop a relationship with the people of Wales in his own way.

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    King Charles Queen Elizabeth II
    Kristin Contino
    Kristin Contino
    Senior Royal and Celebrity Editor

    Kristin Contino is Marie Claire's Senior Royal and Celebrity editor. She's been covering royalty since 2018—including major moments such as the Platinum Jubilee, Queen Elizabeth II’s death and King Charles III's coronation—and places a particular focus on the British Royal Family's style and what it means.

    Prior to working at Marie Claire, she wrote about celebrity and royal fashion at Page Six Style and covered royalty from around the world as chief reporter at Royal Central. Kristin has provided expert commentary for outlets including the BBC, Sky News, US Weekly, the Today Show and many others.

    Kristin is also the published author of two novels, “The Legacy of Us” and “A House Full of Windsor.” She's passionate about travel, history, horses, and learning everything she can about her favorite city in the world, London.

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