Some ramblings:
One thing that's always struck me as fairly interesting. In the 1930s, the British are trying to figure out how they can give India self government while keeping it in the Empire, and the Indian National Congress (more or less) plays along.
Then you get WW2; the quit India campaign, Britain declaring martial law across the subcontinent, etc. And then Britain's withdrawal as soon as it can postwar.
This suggests to me that even without WW2, continued British rule of the subcontinent, even nominal dominion status, is unlikely to stick.
Thoughts?