Good Morning Britain reporter Cordelia Kretzschmar said British publications had refused the photograph of the Duchess of Cambridge's bottom despite it being taken in a public space on an official visit.
Kensington Palace has declined to comment, she said, but royal aides would be infuriated by the incident given how recently they took action against a French publication for another breach of royal privacy.
Cordelia Kretzschmar also notes that the Queen uses tiny curtain weights along her hemlines to prevent windy conditions compromising her modesty.
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"We've never actually spoken so publicly about her," the Duke of Cambridge said. "But we felt that this was the right time to do it."