Confused about what documents to send for my baby's passport application

[dodomin]

I am being dumb, but I am so confused about what to send for my 8 month old DS's passport application.

Under Parent's documents it says "for one of your parents". Does that mean me and DH OR my parents/ILs? It feels like it should be the latter ie. DS's grandparents given the type of ID they want (please see my screenshot) as both DH and I were born in the UK (but DH's parents weren't born here).

I applied for my baby’s first passport recently and I can’t remember exactly what evidence it said I needed (as in, I can’t remember if it was worded like your screenshot as it does seem confusing!) and I sent my birth certificate and my baby’s. All was fine x

Its your details they need
The applicant is your child and the parents are the parents of the applicant I.e. you or your dh

YOU are the parents of the child so they want your passport/birth certificate etc as well as babies birth certificate etc