Section 12(1A) Terrorism Act 2000 Is Article 10–Compatible Without a Freestanding Proportionality “Defence”: Proportionality Is Built Into the Offence’s Knowledge-and-Recklessness Ingredients

Case: ABJ, R. v Citation: [2026] UKSC 8 (UKSC) Date: 26 February 2026
Judgment: Lord Reed (Lord Sales, Lord Lloyd-Jones, Lord Burrows and Lord Richards agreeing)

1. Introduction

These conjoined pre-trial appeals concerned whether section 12(1A) of the Terrorism Act 2000 (as inserted by the Counter-Terrorism and Border Security Act 2019) is compatible with article 10 ECHR (freedom of expression), as applied domestically through the Human Rights Act 1998.

Two anonymised defendants were charged under section 12(1A) in relation to alleged expressions supportive of Hamas (a proscribed organisation). The prosecutions had not yet been tried; the Supreme Court addressed (i) the ingredients of the offence and (ii) whether proof of those ingredients is, in principle, sufficient to make any resulting interference with article 10 proportionate—without any additional, freestanding proportionality assessment by the jury or trial court.

The Secretary of State for the Home Department intervened, reflecting the national security context.

2. Summary of the Judgment

• Appeals dismissed. Section 12(1A) is not inherently incompatible with article 10.
• “Prescribed by law” satisfied. The offence is sufficiently clear and foreseeable for article 10(2).
• Proportionality is embedded in the offence. If the statutory ingredients are proved, the interference with article 10 is, in principle, justified (subject to proportionality of sentence).
• No freestanding proportionality assessment is required over and above proof of the elements; accordingly, there is no need to decide whether a jury would have to conduct such an assessment.
• Important operational safeguard: judges should be robust in stopping weak cases (no case to answer) to avoid overbroad applications chilling legitimate debate.

3. Analysis

3.1 Precedents Cited

(A) Domestic interpretation of terrorism offences and mens rea

• R v Choudary [2016] EWCA Crim 1436; [2018] 1 WLR 695
  Influence: (i) exposed a “gap” in section 12(1) (inviting support) which prompted Parliament to enact section 12(1A); (ii) supplied the court’s understanding of “support” as encompassing “intellectual support” (approval/endorsement), and reinforced that terrorism provisions do not criminalise mere belief or mere expression unless statutory conditions are met; (iii) supported the proposition that the relevant conduct is not strict liability and requires knowing action.
• Sweet v Parsley [1970] AC 132
  Influence: established the general presumption that statutory offences require knowledge/intent unless clearly displaced. This underpinned the UKSC’s conclusion that section 12(1A) requires the defendant to know they are expressing an opinion/belief supportive of the organisation.
• Pwr v Director of Public Prosecutions [2022] UKSC 2; [2022] 1 WLR 789 ("Pwr")
  Influence: decisive on two key points applied here: (i) proscription offences are not strict liability in the sense of accidental “belonging/inviting support”; (ii) there is no requirement that a defendant knows the organisation is proscribed (ignorance of law; proof difficulties), a conclusion the UKSC carried across into section 12(1A).
• R v G [2003] UKHL 50; [2004] 1 AC 1034
  Influence: supplied the modern definition of recklessness adopted for section 12(1A): subjective awareness of risk plus objective unreasonableness in taking it.
• R v Z (Attorney General for Northern Ireland's Reference) [2005] UKHL 35; [2005] 2 AC 645
  Influence: supported a purposive approach to interpreting terrorism legislation so as to give effect to Parliament’s protective aims, avoiding unduly technical readings (eg, not requiring express naming of the organisation if implication is sufficiently clear as a matter of fact).

(B) Domestic approach to Convention compatibility and proportionality “built into” offence elements

• In re Abortion Services (Safe Access Zones) (Northern Ireland) Bill [2022] UKSC 32; [2023] AC 505 ("Safe Access Zones")
  Influence: provided the structured methodology: the critical question is whether the ingredients of the offence strike a fair balance so that, if proved, conviction is not disproportionate—rather than requiring a separate proportionality verdict question in each case.
• Sheldrake v Director of Public Prosecutions, Attorney General's Reference (No 4 of 2002) [2004] UKHL 43; [2005] 1 AC 264
  Influence: cited as indicating, obiter, that section 11(1) can be compatible with Convention rights on a similar “ingredients strike balance” basis.
• In re JR123 [2025] UKSC 8; [2025] AC 1256 and Shvidler v Secretary of State for Foreign, Commonwealth and Development Affairs [2025] UKSC 30; [2025] 3 WLR 346
  Influence: supported the proposition that Convention compatibility is a question of law, not ordinarily a matter for juries—reinforcing the court’s scepticism about a jury-based proportionality assessment (even though it ultimately found such an assessment unnecessary).

(C) “Prescribed by law” and legal certainty

• R v Misra and Srivastava [2004] EWCA Crim 2375; [2005] 1 Cr App R 21
  Influence: used to emphasise domestic legal certainty principles paralleling the Convention requirement of protection against arbitrariness.
• Terentyev v Russia (Application no 10692/09) judgment of 28 August 2018, unreported and Alekhina v Russia (Application no 38004/12) (2018) 68 EHRR 14
  Influence: confirmed that some interpretive content in criminal law is inevitable; foreseeability does not require absolute certainty; courts clarify application.
• R v Golds [2016] UKSC 61; [2016] 1 WLR 5231
  Influence: domestic reinforcement that “certainty is desirable” but excessive rigidity is not required.
• Internationale Humanitäre Hilfsorganisation eV v Germany (Application no 11214/19) judgment of 10 October 2023, unreported
  Influence: supported (i) variable precision depending on field (counter-terrorism permits broader framing), and (ii) the legitimacy and weight of measures countering indirect support for terrorism.

(D) Article 10 in terrorism-related expression: contextual, consequence-focused assessment

• Hizb Ut-Tahrir v Germany (Application no 31098/08) (2012) 55 EHRR SE12 and Roj TV A/S v Denmark (2018) 67 EHRR SE8
  Influence: illustrated article 17 “abuse of rights” can exclude reliance on article 10/11 in extreme cases (eg calls for violent destruction/killing). The UKSC noted article 10 was accepted to be engaged on the assumed facts here.
• Zana v Turkey (1997) 27 EHRR 667
  Influence: key Grand Chamber authority: conviction for expressing support for a terrorist group may be proportionate depending on context and potential to inflame violence—without requiring proof of intent to incite.
• Hogefeld v Germany (Application no 35402/97) (2000) 29 EHRR CD173
  Influence: recognised state interest in preventing recruitment/support for terrorist organisations; restrictions may be proportionate where statements could strengthen supporters.
• Leroy v France (Application no 36109/03) judgment of 2 October 2008, unreported
  Influence: upheld conviction for apologie du terrorisme; emphasised context (immediate aftermath of 9/11), objective meaning, and potential consequences; intent was treated as irrelevant by the national court (a contrast with the UK’s additional subjective elements).
• Taşdemir v Turkey (Application no 38841/07) decision of 23 February 2010, unreported
  Influence: upheld conviction where slogans amounted to an apology for terrorism; supported the proposition that praising/endorsing armed wings or leaders can justify restriction.
• Gül v Turkey (2010) 52 EHRR 38 and Kiliç and Eren v Turkey (Application no 43807/07) judgment of 29 November 2011, unreported
  Influence: demonstrated limits: peaceful-demonstration slogans may fall within protected speech where they do not amount to apology for terrorism/encouragement of violence; these cases informed the UKSC’s insistence on careful, fact-sensitive application of section 12(1A).
• Gerger v Turkey (Application no 24919/94) judgment of 8 July 1999, unreported
  Influence: supported that the size of audience is a relevant proportionality factor.
• Ceylan v Turkey (Application no 23556/94) (1999) 30 EHRR 73
  Influence: reinforced that penalty severity is integral to proportionality analysis—mirrored in the UKSC’s emphasis on sentencing proportionality.

(E) Deference/margin of appreciation and parliamentary assessment

• Animal Defenders International v United Kingdom (Application no 48876/08) (2013) 57 EHRR 21
  Influence: supported giving weight to a careful parliamentary process when assessing proportionality and the appropriate margin of appreciation.
• Schwabe v Germany (2011) 59 EHRR 28 and Internationale Humanitäre Hilfsorganisation eV v Germany
  Influence: supported a wider margin of appreciation for states countering terrorism.
• Council of the European Union v Hamas EU:C:2021:950; [2022] 4 WLR 26
  Influence: used to support the broader international/legal recognition of Hamas’s terrorist character in sanctions/proscription contexts, answering arguments that applying section 12(1A) to the whole organisation was disproportionate.

3.2 Legal Reasoning

(A) The offence: clarified and “de-misdescribed”

The UKSC stressed that section 12(1A) is often loosely described (including in the indictments here) as “expressing support for a proscribed organisation”, but that is legally incomplete: the offence requires not only supportive expression, but also the recklessness limb about encouraging others.

(B) The ingredients of section 12(1A)

The Court identified the elements required for conviction and, crucially, treated them as the mechanism which performs the Convention “balancing” at trial. In summary, the jury must be sure that:

1. the defendant expressed an opinion or belief (not merely held it);
2. the opinion/belief was objectively supportive of an organisation (not merely aligned with its aims);
3. the defendant knew they were expressing an opinion/belief supportive of that organisation;
4. the organisation was proscribed at the time (but defendant need not know this);
5. there was a risk that a person to whom the expression was directed would be encouraged to support the organisation;
6. the defendant knew of that risk;
7. it was objectively unreasonable to take the risk in the circumstances known to the defendant.

(C) “Supportive of an organisation” vs “supportive of an objective”

The Court treated this as a central narrowing feature protecting political debate. Support for Palestinian statehood (or criticism of Israeli policy) is not, without more, support for Hamas. The inquiry is factual and contextual, turning on how words would naturally and reasonably be understood in the circumstances.

(D) No knowledge-of-proscription requirement

Applying Pwr, the Court rejected any requirement that the defendant know the organisation is proscribed: proscription is a legal status, ignorance of law is no excuse, and requiring proof would make the offence “virtually unworkable.” The Court also considered this not unduly burdensome because proscription is easily ascertainable.

(E) “Directed” and the limits of audience

The term “directed” was read as importing intention: accidental reach is excluded. This mattered concretely to the first appellant: her remarks were directed to those present, not to later readers of a newspaper’s online video.

(F) Article 10: legality, legitimacy, necessity/proportionality

• Prescribed by law: The Court rejected vagueness arguments. The statutory language was intelligible; interpretive application by courts is expected under ECHR jurisprudence; comparable or broader formulations have been accepted by Strasbourg.
• Legitimate aims: National security, public safety, prevention of disorder/crime, and protection of others’ rights (including life), including in an international dimension.
• Necessary in a democratic society: The Court accepted a “pressing social need” arising from radicalisation and “inspired” lone-actor terrorism, and emphasised the wide margin of appreciation in counter-terrorism. It treated the statutory elements—especially the knowledge requirement and the two-limbed R v G recklessness test—as ensuring that only expression presenting a culpable, unreasonable risk of encouraging support is criminalised.

(G) No freestanding proportionality assessment at verdict stage

Following Safe Access Zones, the Court held that once the offence ingredients fairly balance the right and the public interest, no additional “mini-Convention trial” is required in each prosecution. Proportionality is to be controlled through (i) correct application of the elements, (ii) robust “no case” rulings where evidence cannot meet them, and (iii) proportionate sentencing.

(H) The judge’s special responsibility to prevent overreach

The Court accepted that section 12(1A) cannot enumerate lawful/unlawful statements in advance. That inevitability heightens the trial judge’s duty to ensure a reasonable jury could be sure of each element; otherwise the case must be stopped. This is presented as a key safeguard against chilling legitimate discourse.

3.3 Impact

• Operational clarity for prosecutors and trial courts: charges and directions must reflect that section 12(1A) is not mere “support” but supportive expression plus reckless risk of encouragement.
• Enhanced protection for political debate (in form): by insisting on “organisation” support (not “aims”), knowledge of supportive meaning, and a calibrated recklessness test tied to the directed audience.
• Higher emphasis on early judicial gatekeeping: the UKSC’s explicit call for robust “no case to answer” scrutiny is likely to shape case management, submission practice, and appellate review of borderline prosecutions.
• Limits on “proportionality defences”: defendants cannot generally demand a freestanding jury (or court) proportionality assessment once the offence is proved; the Convention work is done through statutory construction and element-proof.
• Sentencing as the key proportionality lever post-conviction: proportionality concerns shift to penalty choice, guided by sentencing guidelines and ECHR principles.

4. Complex Concepts Simplified

• Proscribed organisation: an organisation listed in Schedule 2 to the Terrorism Act 2000 (or operating under the same name). Proscription is made by statutory instrument, typically with parliamentary approval, and can be challenged through a dedicated deproscription/appeal process.
• “Supportive of” (intellectual support): not material help, but approval/endorsement that can strengthen an organisation by legitimising it and giving it “oxygen of publicity.”
• Recklessness (R v G): (i) the defendant actually foresaw the risk of the prohibited result, and (ii) taking that risk was objectively unreasonable given what the defendant knew.
• “Directed” audience: the people the speaker intended to reach. If a third party later republishes content to a new audience, that new audience is not automatically “directed” by the original speaker for section 12(1A)(b).
• “Prescribed by law” (article 10(2)): the rule must be accessible and sufficiently precise to guide conduct, but does not need perfect certainty; courts are expected to interpret and apply general statutory language.
• Margin of appreciation: Strasbourg affords states more discretion in sensitive fields like counter-terrorism, particularly where democratic institutions have carefully assessed risks and rights.
• Article 17 (abuse of rights): in extreme cases (eg direct advocacy of violent destruction/killing), Strasbourg may bar reliance on article 10 altogether. The UKSC accepted article 10 was engaged on the assumed facts here.

5. Conclusion

The Supreme Court’s core contribution is to locate Convention proportionality primarily in the structure of section 12(1A) itself: the offence is tightly defined around (i) knowing expression supportive of a proscribed organisation and (ii) culpable recklessness as to encouraging support among an intended audience. On that basis, the Court rejected both a declaration of incompatibility and the argument for a freestanding, jury-determined proportionality assessment. The judgment simultaneously endorses Parliament’s counter-radicalisation objective and strengthens trial-level safeguards by directing judges to police the statutory elements robustly—especially by stopping cases that cannot properly meet them and by ensuring proportionate sentencing where convictions occur.