Channel 4 have released more promotional information on Indian Summers. From their article, Introducing the World of Indian Summers
Lord Willingdon [the only real-life character in Indian Summers, played by Patrick Malahide] harks back to an earlier era of empire: his response to the rise of Indian nationalism is brutal and repressive, leaving that movement in a state of anger and frustration.
Here is Lord Willingdon’s wikipedia entry. Here is another interesting link, it is a British Pathe video: “Lord Willingdon, the Viceroy reviews British and Native Troops and sees “Jaipur” captained by its young Maharajah – defeat Kashmir.”