Prince William and Kate Middleton's joint message on Armed Forces Day.

Surprising fears about the monarchy's future emerge among commentators.

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Royal expert Richard Fitzwilliams voices concerns in a candid interview.

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He underscores the impact of Kate and Princess Anne's health.

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William and Kate are seen as pivotal to the monarchy's future.

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Kate's influence spans from early childhood studies to public engagements.

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Princess Anne's recent accident highlights unforeseen challenges.

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The expert contrasts her views on a streamlined monarchy.

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These developments raise questions about the monarchy's resilience and continuity.

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