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The Duke of Edinburgh's final official royal engagement before retirement will be a parade today at Buckingham Palace to mark the finale of the Royal Marines 1664 Global Challenge.

Lady Myra Butter, who has known the Duke since childhood and the historian Christopher Lee discuss his legacy.

Gyles Brandreth, who has written the Prince's biography and known him 40 years, says he may "miss the activity" as he has been the busiest royal throughout his time.

(Image: Prince Philip. Credit: AFP.)