Paragraph 16
In the case of an applicant who claims to be a British citizen, who does not currently hold a valid United Kingdom passport describing the applicant as a British citizen, who was not born or adopted in the United Kingdom, but who has been issued with a certificate of registration or naturalisation –
(a)
the applicant’s passport on which the applicant first entered the United Kingdom; and
(b)
the applicant’s valid certificate of registration or naturalisation.