Sex-enhancing drugs were discovered at one of the royal family’s estates after then-Prince Andrew threw a party for pedophile pal Jeffrey Epstein and his madame, Ghislaine Maxwell, according to a new book.

Staff found the stash of drugs, known as poppers, alongside condoms and lubricant at the sprawling Sandringham estate back in 2000 when they were cleaning up after the soiree, biographer Robert Jobson alleges.

The Windsor Legacy book, obtained by the Daily Mail, claims the items were found scattered in bathrooms at the famed property.

Andrew, who was stripped of his last remaining royal titles last week, is said to have hosted the event for Maxwell’s 39th birthday.

The disgraced former royal previously admitted to inviting Epstein and Maxwell to the estate — but claimed that it was j

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