u/Iheartsnacking

I have a fast track passport appointment to get my son's first passport at the London office. I have his birth certificate and both parents passports but don't have either of our (parents of baby) birth certificates available to bring.

Do I need the parents birth certificates at the appointment or will our passports be enough for them to approve the passport?

I called the hotline and they have said it's up to them on the day whether they accept just our passports so wondering if anyone has done this without parents birth certificates?

Thanks in advance