Prince Philip spends most of his time in Norfolk, on Queen Elizabeth's Sandringham estate. He's 98 years old and despite his retirement from royal duties, it seems like the Duke of Edinburgh has been facing stressful days within the royal family, which affect his health.

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Experts believe Prince Philip won't be around the Queen's entire reign

Royal expert, Angela Mollard, believes Queen Elizabeth fears for Prince Philip's poor health, which could result in an "annus horribilis part 2" for Her Majesty; the last time she claimed it was her worst year was in 1992.

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Mollard suggested that Prince Philip won't be around for the entirety of Queen Elizabeth's reign, which currently stands at 67 years.

Queen Elizabeth still has to face a series of challenges such as Harry and Meghan's exit, Princess Beatrice's wedding, not to mention Prince Andrew's scandal.

Experts believe this could be a "horror" year for Her Majesty.

Prince Louis , Princess Charlotte and Prince George

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