British passport for a child born abroad

[gbenghus]

Hi, can someone please advice me on how to go about applying British passport for my child born in Nigeria 2 months ago. I am British by naturalisation, married my wife who resides in Nigeria in 2014. I had already applied for spouse visa for my wife but was refused but appeal is ongoing on that.
I want to apply for British passport for my baby in Nigeria and want to ask the following:
Can I apply for the British passport from UK or Nigeria?
If I apply from Nigeria, can I enclose photocopy of my British passport in the application or the original? But I may want to travel out of UK before outcome of the application!
I learnt there may be interview. Where will the interview be; Nigeria or UK?

Will my child address on the application from be Nigeria and mine address UK?

[gbenghus]

Good morning. Please I am still expecting your advise on my earlier post. I have gone through similar topic but I have some peculiar question?
Will I enclose my original BP or the photocopy?
Where will interview take place, Nigeria or UK?
Can I send the application from UK?
Will I use Nigeria address for child and UK address for mine since I live in UK?