I am flying out to New Delhi from London for one month and this would be the last visit on my current tourist visa which I have. There may be plans to extend my stay and there is no problem apart from the fact that if I wanted to stay then my visa would expire and obviously I need a valid visa. Is it a possible to extend my India visa on my British passport while I am in India? Where can I get the visa extension from in India? How long will the procedure take and how long before do I need to apply for the visa?