[ganeshkrishnan]

>Much of South India and Eastern India was already British ruled by the early 1800s.

No they were not. They were run by private East India Company. With the revolt of 1857 and quashing of the rebellion, the official Raj by the British Royals began

https://en.wikipedia.org/wiki/Indian_Rebellion_of_1857

You are still bickering over pedantic stuff. Britain profited from slave trade. They just didn't want to use the term "slave" and used "colony" instead.