Certificate of entitlement- Right of abode

Hi Everyone,
subject;- applying for ROA from India.
I have a query regarding COE-ROA for my 3 year old son.
He recently got certification of registration as a British Citizen, currently he is in India with his mom and I want to bring him back to uk. I know applying for British passport from India will take more time, so decided to apply for COE-ROA. Can someone help me what are all the documents needed to apply and do they need to be original at the time of application. As the original documents are with me in UK. Below are the list i have got.

1. Child Indian passport(in India).
2. 2 Child photos.
3. Child British Citizen certificate(in UK).
4. Child Birth Certificates(in UK).
5. Marriage Certificate(in UK).

Please let me know what other documents i have to include and do we have to show all originals.
Thanks in advance.

Regards,
AJK9999.

Can someone please help me with this query.
Thanks.