Need help to understand rule and possible legal implication for my case.
=> Planing to start Naturalization process by August end, which i believe may be completing by Feb'16 including ceremony process.
=> My Indian Passport is expiring in mid-March'16.
Query :- After naturalization process.. I can only apply for British Passport.... which may take further 1-2 months time.
Is it legal to surrender expired Indian passport after that ?
I know this is tricky situation.. just in case someone can advise me on this.

~Ali