Pham v Secretary of State for the Home Department [2015] UKSC 19

Mr Pham was born in Vietnam and later acquired British citizenship after moving to the United Kingdom. The Secretary of State deprived him of British citizenship in 2011 on public-good grounds, believing that he retained Vietnamese nationality. He challenged the order, arguing that it would make him stateless. SIAC accepted that preliminary ground, but the Court of Appeal reversed it. The Supreme Court appeal concerned his nationality under Vietnamese law at the time of the order. Other grounds challenging the deprivation, including proportionality arguments, had not yet been finally determined.

Did the deprivation order render Pham stateless within the relevant statutory and Convention definition, and what remained for SIAC to decide if that preliminary objection failed?

The Supreme Court dismissed the appeal on statelessness and confirmed the remittal to SIAC. The evidence did not establish that Pham had ceased to be a Vietnamese national under the operation of Vietnamese law when the British deprivation order was made. The Vietnamese authorities’ subsequent position did not establish the necessary loss of nationality at that earlier date. The judgments also discussed EU citizenship and proportionality, including the intensity of common law review, but did not finally determine the remaining grounds against deprivation. The decision must therefore be kept separate from later Pham litigation. It was not a ruling that citizenship could be removed without regard to statutory safeguards or that the underlying security assessment had already been judicially proved.

The statelessness restriction required assessment of nationality under the operation of the foreign state’s law at the time of deprivation. Pham’s preliminary objection failed, but other challenges remained for SIAC. The judgment did not finally approve every aspect of the deprivation decision.

Pham is significant for distinguishing legal nationality from another state's practical willingness to acknowledge a person. It also contains important discussion of proportionality and the intensity of common-law review. That discussion did not finally resolve every challenge to the deprivation decision: the statelessness issue and the remaining proceedings were distinct. An examination answer should identify which question the 2015 appeal decided before relying on broader judicial observations. Later nationality legislation and the UK's withdrawal from the EU require separate analysis of any contemporary deprivation problem.