Why Britain might accept an Indian battleship

Would the British government permit an Indian navy to possess a battleship?

Probably, because a single ship posed little threat and could be useful as a permanent Far Eastern capital unit.

Britain would have to weigh the political risk of an Indian navy possessing a capital ship. One battleship would not by itself threaten imperial control. Its permanent station in the Far East could instead provide useful regional strength. The decision balances restrictions on colonial military power against the benefit of locally based forces.