35 citizenship pathways — everything you need to know about eligibility, documents, timelines, and costs.
1 pathway in this category
Minor adopted under UK adoption order (s.1(5) BNA) automatically becomes BC if at least one adoptive parent is BC; Hague 1993 + Adoption and Children Act 2002 for overseas adoptions.
4 pathways in this category
Born in UK after 1983-01-01; at least one parent is BC or settled in UK at time of birth.
Person born in UK before 1983-01-01 was CUKC; at 1983 partition, became BC, BOTC, or BOC depending on connection.
Born in BOT (one of 14); at least one parent is BOTC or settled in that BOT.
Newborn found abandoned in UK presumed BC; stateless child born in UK with 5y residence may register.
8 pathways in this category
Born outside UK to parent who is BC otherwise than by descent.
Born outside UK to BC parent serving Crown abroad in designated UK service — bypasses 'by descent' limitation.
Minor of BC-by-descent parent, with 3y UK residence, may register as BC.
Pre-1983 CUKC by descent transitioned at partition to BC, BOTC, or BOC depending on connection.
Born outside BOT to BOTC parent (analogous structure to s.2 for BC).
Pre-1997 BN(O) cohort — limited transmission via Hong Kong (British Nationality) Order 1986; closed for new descent post-handover.
Anyone born before 1983-01-01 who would have been BC if BNA 1981 had been gender-neutral may register; broadened by NIAA 2002 → BCIA 2009 → NABA 2022.
Born outside UK to BC parent serving in HM Armed Forces; entitled to register.
5 pathways in this category
Persons who were CUKC immediately before 1983-01-01 became BC, BOTC, or BOC depending on connection per Schedule 6 BNA 1981.
Persons domiciled in UK or Dominions on 1948-12-31 became British Subjects under BNA 1948 s.1; mostly closed cohort.
Commonwealth citizens UK-resident before 1973 with auto Right of Abode under IA 1971 §2(1)(d); Windrush remedial framework.
Hong Kong CUKC cohort pre-1986 → BN(O) registration window 1986-01-01 to 1997-06-30.
British Dependent Territories Citizens (BDTC) renamed to BOTC by BOTA 2002 §1; substantive status preserved.
2 pathways in this category
Cross-bucket alias of GB-NAT-02; tracked as MAR for marriage-route surfacing in queries.
Pre-2002 spouse registration under BNA 1981 s.8 — REPEALED by NIAA 2002.
1 pathway in this category
BC parent serving Crown abroad in designated UK service transmits BC by descent (s.2(1)(b)) without 'by descent' limitation; covers HM Forces overseas service.
6 pathways in this category
Adult of full age and capacity, 5y UK residence, ILR 12+ months, good character, language test (English/Welsh/Scots Gaelic), Life in UK test.
Adult married/CP to BC, 3y UK residence (no separate post-ILR period), good character, language + Life in UK test.
Stateless person born in UK 5y residence; or stateless minor 5y residence (Sch.2 paragraphs 3-4).
BN(O) holder + dependants apply via BN(O) Visa scheme (since 2021-01-31); 5y residence → ILR; 1y ILR → BC under §6(1) standard naturalisation.
BOTC with substantial connection automatically registered as BC under BOTA 2002 §3.
BOC may be registered as BC under §4 discretionary provisions; specific measures for Hong Kong East-Asian residents 1989-1990s.
3 pathways in this category
Person who renounced BC under §12 may resume status: §13(1) entitled (one resumption only) for non-by-descent; §13(3) discretionary subsequent.
Secretary of State may deprive BC of citizenship if conducive to public good (s.40(2)) or fraud (s.40(3)); Begum/Pham/2025 UKSC cluster (N3, U3, Kolicaj) defines scope.
Appeals lie to FTT (IAC) → UT (IAC); s.40A(2)(a) certified cases (national security) go to SIAC.
5 pathways in this category
Bilateral UK-IE arrangement permitting freedom of movement + RoA reciprocity; preserved through Brexit; underpins §4AA Irish-citizen registration.
Irish citizen with 5y UK residence may register as BC under BNA 1981 §4AA (inserted by BN(IC) 2024 §1).
Affected Commonwealth + their families register without fee via Windrush Scheme launched 2018-05-30; Williams Lessons Learned Review 2020-03-19; NABA 2022 §11-12 expansions.
Jersey + Guernsey + Isle of Man residents may acquire BC via parental link (UK BNA applies); distinct from BOTC framework.
EU/EEA/Swiss + family members under EUSS settled status (post-2019) → 5y residence + 1y ILR-equivalent → BC under §6(1) standard naturalisation.
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