Registering a Child Born Abroad to a British Citizen By Descent after 3 Years Residence in the UK - Section 3(5) Application

: Written by: Arshad Mahmood; Last Updated: 03 May 2026

Where a child born abroad to a parent British Citizen by descent cannot qualify for registration as a British citizen under Section 3(2) can qualify for registration as a British Citizen under Section 3(5) if the child and his parents live in the UK or a British overseas territory for 3 years continuously and during this period of residence they are not absent from the UK or a British overseas territory for more than 270 days. An application for the registration of a child under Section 3(5) of the BNA 1981 is made using the MN1 application form.

Legal Framework for Registering a Child as a British Citizen under Section 3(5) of BNA 1981

Section 3(5) of the British Nationality Act 1981 provides as follows:

"(5) A person born outside the United Kingdom [and the qualifying territories] shall be entitled, on an application for his registration as a British citizen made while he is a minor, to be registered as such a citizen if the following requirements are satisfied, namely—

(a) that at the time of that person’s birth his father or mother was a British citizen by descent; and

(b) subject to subsection (6), that that person and his father and mother were in the United Kingdom [or a qualifying territory] at the beginning of the period of three years ending with the date of the application and that, in the case of each of them, the number of days on which the person in question was absent from the United Kingdom [and the qualifying territories] in that period does not exceed 270; and

(c) subject to subsection (6), that the consent of his father and mother to the registration has been signified in the prescribed manner.

(6) In the case of an application under subsection (5) for the registration of a person as a British citizen—

(a) if his father or mother died, or their marriage [or civil partnership] was terminated, on or before the date of the application, or his father and mother were legally separated on that date, the references to his father and mother in paragraph (b) of that subsection shall be read either as references to his father or as references to his mother; and

(b) if his father or mother died on or before that date, the reference to his father and mother in paragraph (c) of that subsection shall be read as a reference to either of them."

To qualify under this section, the child, their mother, and their father should have lived in the UK (or a British Overseas Territory if born after 21 May 2002) for a 3-year period ending on the date the application is received. And the child and their parents should be physically present in the UK or a British Overseas Territory at the start of that period. The child and their parents must not have been absent from the UK (or the British Overseas Territories if appropriate) for more than 270 days during the 3-year residential period. There is no discretion to disregard absences greater than 270 days.

Both parents must consent to the child's registration as a British citizen. If one of the parents has died, then only the consent of the surviving parent is required.

A child registered under this section will be a British citizen otherwise than by descent.

If the parents’ marriage or civil partnership has ended or they are legally separated, then only the child and one parent have to satisfy the residence requirement.

How Can We Help?

Our expert team of nationality law solicitors in London and Birmingham can represent you in your child's application for registration as a British Citizen and carry out all the work on your British Citizenship application until a decision on your application is received from the Home Office UKVI. As part of our professional legal services in relation to your application for registration as a British Citizen, our specialist team of immigration solicitors will carry out the following immigration casework:

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We will prepare a detailed cover letter in support of the application, explaining your child's eligibility for registration as a British Citizen by referring to all relevant information, documents, laws, and requirements.
We will upload all supporting documents online for consideration in support of your child's application, including our cover letter.
We will carry out all the work on your child's application for registration as a British Citizen until a decision is received from the Home Office UKVI on your child's British citizenship application.

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