Part I British Citizenship
Acquisition after commencement: special cases
10 Registration following renunciation of citizenship of U.K. and Colonies.
C1C21
Subject to subsection (3), a person shall be entitled, on an application for his registration as a British citizen, to be registered as such a citizen if immediately before commencement he would (had he applied for it) have been entitled under section 1(1) of the M1British Nationality Act 1964 (resumption of citizenship) to be registered as a citizen of the United Kingdom and Colonies by virtue of having an appropriate qualifying connection with the United Kingdom or F1. . . by virtue of having been married before commencement to a person who has, or would if living have, such a connection.
C1C32
On an application for his registration as a British citizen made by a person of full capacity who had before commencement ceased to be a citizen of the United Kingdom and Colonies as a result of a declaration of renunciation, the Secretary of State may, if he thinks fit, cause that person to be registered as a British citizen if that person—
a
has an appropriate qualifying connection with the United Kingdom; or
3
A person shall not be entitled to registration under subsection (1) on more than one occasion.
4
For the purposes of this section a person shall be taken to have an appropriate qualifying connection with the United Kingdom if he, his father or his father’s father—
a
was born in the United Kingdom; or
b
is or was a person naturalised in the United Kingdom; or
c
was registered as a citizen of the United Kingdom and Colonies in the United Kingdom or in a country which at the time was mentioned in section 1(3) of the 1948 Act.