2ndly, after going through the new law and fee I need clarification on the fee, I know a group will pay the registration fee plus the ceremony fee while the other group will pay only ceremony fee. pls can you expatiates, which category do I belong and the form is saying something about biometric number :

''Following registration under paragraphs 4G-4I, a person will be a British citizen “by descent” if he or she would automatically have become a British citizen by descent had his or her parents been married.
A person registering under section 4F whose only route to registration as a British citizen (had their parents been married) would have been under section 3(2) will be a British citizen by descent.
Those applying under section 4F will need to pay an application fee.
Those applying under sections 4G – 4I will not pay a registration fee, but will have to pay a ceremony fee of £80.''
thanks