Fiancee visa and son

We're in the UK now

Starting to put our minds on getting our son his UK passport. Upon looking at the supporting documents in the booklet it seems too simple to me.
https://www.gov.uk/government/uploa...ent_data/file/505817/Applyingforapassport.pdf

First British passport born after 2006.
Table B. I can provide Fathers British birth certificate.
Table D. Provide grandparents claim to british nationality if father is born after 1983. However does not apply if I provided the fathers British passport number on the form.

Basically provide:
2 photos
uncancelled passport
birth certificate (father named)
fathers' birth certificate
fathers' passport (also passport at time of birth, present at his birth)

Seems little documents to me..?

Am I correct?