Naresh, just request a form or get one from post office, fill it in and submit it baby's birth certificate and with ur passport and ILR as proof that ur son was born when u are settled. If both parents not born in uk then add in grandparents details. Easily done!

Hi, I just applied mine for my newborn son and got it back within 2.5wks. I just write down the names, DOB, place of birth and marriage date for both set of grandparents in a separate piece of paper and in section 8 just state please refer separate paper for details. Not sure why it's needed but no ...