The late Queen is protecting her right-hand woman from "beyond the grave" after handing her a trump card, a friend has claimed.
Angela Kelly, the former monarch's dresser and confidante, famously published two books about her work after being granted extraordinary permission from her boss to do so.
It was understood she had the late Queen's blessing to pen a third book, although recent reports have suggested King Charles scuppered those plans after getting Ms Kelly to sign an NDA (non-disclosure agreement) in exchange for a new grace-and-favour home in Yorkshire.