They boast some of the most famous faces in the country among their number but not every member of the Royal Family is so easily identified, as police outside Buckingham Palace discovered today.
Officers had to resort to a crib sheet to pick out the likes of Princess Alexandra and Prince Michael of Kent but had no such difficulty with the senior royals on the guest list, among them the Duke and Duchess of Cambridge, Prince George and Prince Harry.
Prince William, who was fresh from an early morning visit to homeless charity Centrepoint in London's Soho, arrived with his glossy-haired wife, who looked lovely in her festive cherry-red dress and dramatic chandelier earrings.
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