# The British Nationality (General) Regulations 2003, Paragraph 10


An application under section 4B of the Act shall contain information showing—
(a) that the applicant is a British Overseas citizen, a British subject under the Act, a British protected person or a British National (Overseas) and does not have any other citizenship or nationality; and
(b) (i) in the case of an application made by virtue of subsection (1)(a), (b) or (c), that the applicant has not, after 4th July 2002, renounced, voluntarily relinquished or lost through action or inaction, any citizenship or nationality; or
(ii) in the case of an application made by virtue of subsection (1)(d), that the applicant has not, after 19th March 2009, renounced, voluntarily relinquished or lost through action or inaction, any citizenship or nationality.

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Source: https://www.legislation.gov.uk/uksi/2003/548/schedule/2/paragraph/10 (the official version)
Page: https://openlegislation.uk/british-nationality-general-regulations-2003/schedule-2/paragraph-10
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.