Kate holiday photos: Royals 'will not compromise on privacy'
25 April 2013 Last updated at 09:12 BST
The head of the publisher of France's Closer magazine and a photographer are under formal investigation in France over the publication of pictures of a sunbathing Duchess of Cambridge.
Topless pictures of the duchess, taken during a private holiday in France, were published by Closer in September.
The BBC's Christian Fraser said that the vigorous nature of the investigation was a warning to media organisations across the world.