The intelligence files describe the 1st Earl Mountbatten of Burma and his wife Edwina as ‘persons of extremely low morals’ who frequently had extramarital affairs.
One source said Mountbatten’s penchant for young men made him ‘an unfit man to direct any sort of military operations’.
The files paint a very different picture of the last viceroy of India – who was hailed as a war hero who led allied efforts in southeast Asia before he was assassinated in 1979 by an IRA bomb.
Prince Charles’ uncle and valued mentor Lord Mountbatten (pictured together) was a ‘homosexual with a perversion for young boys’, according to a secret dossier compiled by the FBI
The intelligence files describe the 1st Earl Mountbatten of Burma and his wife Edwina (pictured in their younger days) as ‘persons of extremely low morals’ who frequently had extramarital affairs
It is not known why agents began compiling the dossier, but the FBI has long been known to keep compromising material on high-profile figures, most famously Martin Luther King.
The 75-year-old FBI documents were obtained through a freedom of information request by British historian Andrew Lownie, who has written a biography of the couple.
In the book, The Mountbattens: their Lives & Loves, Mountbatten’s former driver Ron Perks reveals that one of his boss’s favourite destinations was ‘an upmarket gay brothel used by senior naval officers’ called the Red House near Rabat.
Agents began compiling the file, which spans more than three decades, in February 1944, shortly after Mountbatten became supreme allied commander of southeast Asia.
Following his appointment, the FBI interviewed Elizabeth de la Poer Beresford, Baroness Decies, about another matter, and she brought up Mountbatten, The Sunday Times reports.
The file reads: ‘She states that in these circles Lord Louis Mountbatten and his wife are considered persons of extremely low morals.
‘She stated that Lord Louis Mountbatten was known to be a homosexual with a perversion for young boys.
‘In Lady Decies’ opinion he is an unfit man to direct any sort of military operations because of this condition. She stated further that his wife Lady Mountbatten was considered equally erratic.’
Prince Charles with the Earl Mountbatten at Smith’s Lawn in Windsor in the 1970s
Rumours about his personality swirled following his death, fulled by his comment: ‘Edwina and I spent all our married lives getting into other people’s beds’ (the couple pictured together)
It was signed EE Conroy, head of the New York field office, who wrote that she ‘appears to have no special motive in making the above statements’.
Agents then ramped up their intelligence efforts after World War II when Mountbatten became Nato commander of allied forces in the Mediterranean, then admiral of the fleet, and later chief of the defence staff.