This was followed by the Duke’s tell-all memoir, Spare, which sold a record 1.4 million copies on its day of release.

Spare contains a number of explosive revelations about royal life that have sparked a strong reaction among UK and US audiences alike.

Alternative polls suggest Harry and Meghan’s popularity has waned following the release of Spare.

Prior to publication, Harry had a favourability rating of +38, according to a December 5 poll of 2,000 US voters for Newsweek.

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