Siddiqi was born to Indian parents in Mombasa, Kenya[6] with the family moving to Kampala, Uganda in 1957 where she attended the Aga Khan School.
She was an undergraduate at Kampala's Makerere University,[7] reading history and political science, when the military dictator Idi Amin expelled all Indians from the country in 1972.
Sidiqqi has translated poetry from Sanskrit, Persian, Urdu, old literary Hindi dialects, Gujarati and Punjabi into English and acted as a language consultant for Oxford University Press.
[12] She has also subtitled a number of Urdu and Hindu films and TV serials as well as acting as commercial translator and voice-over artiste in three languages for international agencies.
Siddiqi writes and speaks about European history, particularly Nazi-Occupied Europe and the activities of the clandestine Special Operations Executive, and its women agents who were dropped behind enemy lines during World War 2.
Her research also includes the life and work of Inayat Khan,(1882-1927), Europe's first Sufi master and the first Indian classical musician to travel to the West.