My wife and myself got ILR in March this year. We want to apply for registration for my 3 year old son who was born in the UK. He is currently on an Indian passport.
Due to personal reasons, my wife and son need to travel to India for a month or so. In this instance:
1. Can they travel to India and send the completed registration from India? Will this still take the same waiting timelines of 3-6 months (this gap will be too much for all of us to bear

2. Is there any alternative way to allow them to travel and still apply for the registration?
All help will be highly appreciated!