Is that a completely new application, requiring original birth certificate, etc, to be sent off to HK? Or does it work like a renewal, with you keeping the first passport but with them accepting the application details without documentation, due to the presence of an existing passport? And, did you have to go into the High Comm here for assistance with that?
I haven't shown my passport for at least fifteen years. I think the day of the birth certificate being proof of nationality are long gone, what with government having so many departments not to mention internet search capability. In fact I haven't seen mine for a couple of decades at least.
I phoned the British High Comm and after an age, they found an English speaker and I asked what documents were required. I collected the form, passport photos and cheque and the phoned then I phoned them again and told them I was on my way so not to ask for additional documents!
They took all from me with no questions. I told them I was quite prepared to wait if they wanted to prepare it then but they said it would take a few days and they would inform me when to collect.
As I mentioned, a second passport is required for frequent fliers who often have to submit their sole passport for visa purposes while having to travel in the interim and the BHC do understand this and are unusually cooperative and helpful.