Royal commentator Robert Jobson dismissed Mantel's remarks as "a cheap publicity stunt" and questioned whether she had ever met Catherine or seen her at work.

CNN: STORY HIGHLIGHTS

Royal correspondent Robert Jobson said that team of minders had questions to answer: "Why didn't royal bodyguards ask anyone going into Harry's suite to handover their phones for security, " he tweeted.

CNN: Naked Harry scandal a watershed moment for UK press