Well basically, I am trying to apply for a British passport, in order for me to be able to obtain my passport I need proof that my parents were eligible to be in the UK at the time of my birth as they were both born outside the UK. I don't really see my family a lot for personal reasons but I got in touch with both of my parents and my mother has over the years lost the necessary evidence I need to apply for mine but my father who has a British passport and all I need is the number of his passport to apply for mine is refusing to give it to me. I have my birth certificate and their marriage certificate and all I need is my fathers passport number to complete my application but what can I do if he is refusing? I have emailed many different departments of the home office and the minister of immigration explaining my situation and all I have been told is if I don't have the documents to prove my eligibility then I pretty much have to go through naturalisation to obtain it. I have explained that I have lived in the UK all my life and have recently started a family and would like to be able to take my child abroad but it doesn't seem possible at the moment. Also I know my sister has a British passport too as my parents applied for hers when we were younger but unfortunately not mine which has now put me in this predicament. So I just need some advice on what to do.
My sister isn't willing to help me either. I have already applied with the information that I do have and it wasn't enough even though I fully explained my situation. So if I can't go through naturalisation, then how do I go forward?
I've already looked at this form and I haven't been told anything different to advice I have already been given for free, so would like my money refunded.