That’s interesting, no requirement for parental birth certificates?

I was asked to provide (I am British, wife is Hungarian, living in Hungary) both parents’ birth certificates and all four grandparents’ birth certificates.

My wife is not in touch with her father, so we had to submit a cover letter explaining the situation, which was accepted (although I don’t really see why it was relevant anyway, my son’s Britishness is derived from my Britishness, her nationality and the nationality of her parents is essentially irrelevant).

We also didn’t have to copy the passport of anyone else, but we did have to have a family friend do the confirmation online (family friend is a lawyer in the UK, so was on the list of approved jobs for this).