R (Abbasi) v Foreign Secretary [2002] EWCA Civ 1598
JURISDICTION – DISCRETIONARY POWERS – LEGITIMATE EXPECTATION
Facts
The first claimant was a British national who had been captured by United States forces in Afghanistan and detained in Guantanamo Bay as an ‘enemy combatant’. He was deprived of access to court proceedings and legal advice, and applied for judicial review in the United Kingdom seeking to compel the Secretary of State for Foreign and Commonwealth Affairs either to intervene with the US government or alternatively to explain the omission to do so.
Issues
The primary question was whether the court had jurisdiction to review the decision by the Secretary of State not to intervene. The second question was whether the UK government had any duty to protect the claimant as one of its citizens.
Decision/Outcome
The Court of Appeal referred to ‘forbidden areas’, including the area of foreign policy, into which it would not enquire. The discretion of the Foreign Office was therefore extremely broad. However, the Court could nevertheless review the decision on grounds of rationality and legitimate expectation (for example in this case, there was a legitimate expectation that the representations made to the Foreign Office by the claimant and his family would be taken into consideration in determining whether to intervene).
On the second question, the Court held that there was no legal duty on the state to protect its citizens in such circumstances; however, it also expressed serious concern about the detention process in Guantanamo Bay and the fact that the claimant found himself in a ‘legal black hole’, unable to challenge his detention before any court.
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Updated 19 March 2026
This case summary accurately reflects the decision in R (Abbasi) v Secretary of State for Foreign and Commonwealth Affairs [2002] EWCA Civ 1598. The core legal principles described — the limited justiciability of foreign policy decisions, the broad discretion of the Foreign Secretary, and the availability of judicial review on rationality and legitimate expectation grounds — remain good law and are regularly cited in subsequent public law cases.
Readers should be aware of relevant later developments in this area. The Guantanamo Bay detention context was further considered in domestic courts, most notably in R (Al Rawi) v Secretary of State for Foreign and Commonwealth Affairs [2006] EWCA Civ 1279, which confirmed and developed the Abbasi principles, reaffirming that there is no enforceable duty on the Crown to seek the release of British nationals detained abroad, while accepting that decisions not to intervene remain judicially reviewable on limited grounds. The broader question of the justiciability of prerogative powers in foreign affairs has also been addressed in subsequent cases, including R (Miller) v Secretary of State for Exiting the European Union [2017] UKSC 5, though in a different context.
The article remains a broadly accurate summary of the Abbasi decision itself and is suitable for introductory study purposes.
