More than 50 years after his death, Nehru's private life remains a subject of great sensitivity in Indi, where the Nehru-Gandhi dynasty has dominated politics since Partition. Correspondence between Nehru and Lady Mountbatten reveals the depth of their feelings, with Nehru writing of the "uncontrollable force [that] drew us to one another".
But the Mountbattens' daughter, Lady Pamela Hicks, believes the friendship was not consummated, although she concedes that her mother had a colourful private life.
"Jawaharlal and my mother undoubtedly loved one another. They were soul mates," she told the Daily Telegraph. But "there was no way they could have had a sexual thing at the time because they were never alone". She added: "Besides, Jawaharlal was a very honourable man. The idea of betraying my father, who was a friend, by sleeping with his wife in his own house? No."
The director said: "In the film there are a couple of subtle references to their rumoured affair. However I didn't focus on it because it's not what my film is about."