What's behind the new Prince Louis photo?

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Sean Coughlan says there was a conversation among royal correspondents from various news organisations about whether there would be a royal birthday photograph to mark Prince Louis's sixth birthday. And a photograph might usually have been expected – aimed at royal fans and the newspaper front pages. But it’s tricky because could the palace put out such a publicity photo, while at the same time calling for privacy for Louis’s mother, Catherine, while she undergoes cancer treatment? The BBC's Royal Correspondent reflects on an interesting balancing act. BBC Image: Kensington Palace