1. Introduction
This judgment addresses whether a person may resist surrender to the United Kingdom because contemporary sentencing practice is likely to produce a longer sentence than would have been imposed shortly after the alleged offences. The Supreme Court held that this prospect did not prevent surrender where the applicable historic offences and maximum penalties remained unchanged.
The appellant relied on Article 7 of the European Convention on Human Rights (“ECHR”) and Article 49 of the Charter of Fundamental Rights of the European Union (“Charter”). Both prohibit retrospective criminalisation and the retrospective imposition of heavier penalties. His central contention was that these guarantees protected not merely the historic legal sentencing range, but also the more lenient sentencing practices likely to have operated at the time.
The Court rejected that contention and dismissed the appeal. Its wider importance lies in its explanation of fundamental-rights objections under the EU–UK Trade and Cooperation Agreement (“TCA”), the evidential burden on a person resisting surrender, and the distinction between a genuine risk of unlawful treatment and uncertainty about the legal standard itself.
2. Background and Procedural History
The Minister for Justice, Home Affairs and Migration sought the appellant’s surrender to the United Kingdom for prosecution on eleven allegations of indecent assault and one allegation of gross indecency. The alleged offences concerned two sisters, occurred during the 1970s and 1980s, and related to a period when the appellant was their stepfather.
The High Court, Hunt J., ordered surrender on 8 December 2025. The Supreme Court granted leave to appeal on 20 March 2026: [2026] IESCDET 34.
Although objections concerning delay and private and family life also appeared in the procedural background, the appeal focused almost exclusively on retrospective punishment. The judgment does not provide a separate substantive determination of those other objections.
The uncontested expert evidence
The appellant relied on an opinion from counsel practising in England and Wales. The Minister did not challenge counsel’s assessment that, if convicted, the appellant would probably receive a longer sentence today than he would have received around 1990. Counsel attributed this principally to the hardening of sentencing attitudes towards sexual offending.
Crucially, however, the opinion also established that:
- The appellant would be prosecuted under the legislation applicable when the alleged conduct occurred, principally the Sexual Offences Act 1956 and, for one offence, the Indecency with Children Act 1960.
- He would not be prosecuted retrospectively under the Sexual Offences Act 2003.
- The higher maximum penalties associated with the later legislation would not apply.
- Any sentence would remain constrained by the maximum legally available for the relevant offence when committed.
The dispute was therefore legal rather than factual: did a likely increase in the exercise of sentencing discretion, without an increase in the historic legal maximum, amount to prohibited retrospective punishment?
3. Summary of the Decision
The Supreme Court upheld the surrender order and declined to make a reference to the Court of Justice of the European Union (“CJEU”) under Article 267 TFEU.
- The ECHR objection failed. The United Kingdom remained a Convention state with mechanisms for enforcing Convention rights. Independently, the relevant authorities established that the sentencing practice described did not infringe Article 7.
- The Charter objection also failed. The Irish surrender decision implemented EU law and therefore engaged the Charter. Nevertheless, there was no persuasive basis for interpreting Article 49 as freezing the sentencing practices prevailing when the alleged offences occurred.
- The expert opinion established a likely sentencing difference, not a rights violation. Its factual premise was accepted, but it did not demonstrate that the anticipated sentence would contravene either instrument.
- No further CJEU reference was necessary. The Court considered the answer sufficiently clear on the facts and authorities before it.
The central distinction was between the penalty that could lawfully have been imposed at the time and the sentence that would probably have been imposed in practice. The appellant’s case depended on the latter becoming a binding ceiling. The Court rejected that approach.
4. The Governing Legal Framework
The TCA and Irish implementing legislation
Title VII of Part Three of the TCA establishes arrangements for surrender between the United Kingdom and EU Member States. Its structure resembles the European Arrest Warrant system under Framework Decision 2002/584/JHA, but it operates in a different constitutional setting because the United Kingdom is no longer an EU Member State.
The relevant TCA arrangements were implemented in Ireland through amendments to the European Arrest Warrant Act 2003. The appellant’s statutory objection therefore fell under section 37 of that Act, as amended.
The Court emphasised that the relevant question under section 37 is whether surrender itself would be incompatible with Ireland’s obligations. It is not simply whether some feature of a foreign criminal process would be impermissible if transplanted into Irish law.
Section 37(1)(b), which formerly expressly provided for refusal on constitutional grounds, was repealed by the European Arrest Warrant (Amendment) Act 2024. No constitutional objection was advanced in this appeal. The judgment’s constitutional discussion supplied an analytical comparison rather than an independent ground of decision.
Fundamental rights and mutual confidence
Article 524 TCA anchors criminal cooperation in democracy, the rule of law and fundamental rights, including the ECHR. It also preserves the obligations of the Union and its Member States under the Charter.
The Court’s approach combines two propositions:
- The United Kingdom does not benefit from the same presumption of mutual trust as an EU Member State.
- The TCA nevertheless reflects a substantial, collective judgment that the parties’ legal systems justify close criminal cooperation.
The first proposition requires an independent examination of a properly raised rights objection. The second prevents that examination from becoming a routine retrial of the general adequacy of the requesting state’s justice system.
5. Precedents Cited and Their Influence
A. Historic sentencing and the meaning of an “applicable” penalty
The People (DPP) v MJ
In The People (DPP) v MJ [2022] IESC 50, [2024] 1 IR 523, the Supreme Court explained the Irish approach to sentencing historic sexual offences. The sentencing judge must apply the law governing the offence when committed, including its historic maximum penalty. The judge need not, however, disregard contemporary understanding of sexual offending or its effects on victims.
This authority supported the distinction between preserving legal sentencing limits and recreating an earlier judicial outlook. It also showed that elapsed time can operate in more than one direction: a court may better understand the victim’s enduring harm, but must also consider how the offender has lived during the intervening years.
The present judgment did not treat Irish practice as conclusive proof of Convention or Charter compliance. Rather, it considered that practice relevant to the plausibility and wider consequences of the appellant’s argument.
R v H & Others
R v H & Others [2011] EWCA Crim 2753, [2012] 1 WLR 1416 supplied the corresponding English and Welsh approach. Lord Judge explained that sentencing takes place within the contemporary sentencing regime, but conviction must remain for the historic offence and the maximum penalty applicable when it was committed cannot be exceeded.
This was important because the expert opinion itself relied on that authority. The anticipated sentencing approach was not the retrospective application of the Sexual Offences Act 2003, but contemporary assessment within the limits of the earlier legislation.
R (Uttley) v Secretary of State for the Home Department
The principal authority was R (Uttley) v Secretary of State for the Home Department [2004] UKHL 38, [2004] 1 WLR 2278. That case concerned changes to release arrangements which introduced a period on licence, carrying conditions and possible recall, for an offender whose crimes predated the change.
The House of Lords unanimously rejected the proposition that Article 7 required comparison with the sentence the particular offender would probably have received under earlier practice. The word “applicable” referred to the penalties legally authorised at the time of the offence.
Baroness Hale’s formulation directly answered the present appeal: the court need not compare the sentence it now considers appropriate with a hypothetical sentence imposed shortly after the offending. O’Donnell C.J. regarded this interpretation as persuasive in language, principle and practical operation.
The subsequent Strasbourg application was unanimously declared inadmissible. The Supreme Court acknowledged an important qualification: the applicant’s argument there had been narrowed to whether the licence requirement itself constituted an additional penalty. Nevertheless, Strasbourg’s express reliance on the relevant passages from the House of Lords and its own earlier case law strongly supported the interpretation adopted here.
Coëme v Belgium
In Coëme v Belgium (Applications nos. 32492/96, 32547/96, 32548/96, 33209/96 and 33210/96, 22 June 2000), the European Court of Human Rights stated that Article 7 requires verification that a legal provision criminalised the conduct when performed and that the punishment did not exceed the limits fixed by that provision.
This formulation supplied the Strasbourg foundation for the distinction between an authorised legal range and an expected individual sentence. It was central both to the reasoning in the House of Lords and to the Supreme Court’s rejection of the appellant’s Article 7 argument.
Flynn v HM Advocate and Welch v United Kingdom
Flynn v HM Advocate [2004] UKPC D1, [2004] SCCR 281 had exposed differing views concerning changes to sentencing arrangements, but had not required final resolution of the precise issue subsequently decided in R (Uttley) v Secretary of State for the Home Department. Its discussion therefore did not undermine the later, directly applicable decision.
Welch v United Kingdom (1995) 20 EHRR 247 concerned a confiscation order imposed under legislation introduced after the offending. It illustrated that an additional measure may constitute a “penalty” for Article 7 purposes despite its particular statutory form.
Together, these cases show why the present decision should not be reduced to an unlimited rule that any punishment below an old custodial maximum is necessarily permissible. The nature and legal effect of a changed punitive measure can matter. Here, however, the identified change was tougher discretionary sentencing practice, not the retrospective introduction of an additional sanction.
B. Constitutional principles and comparative support
Enright v Ireland
Enright v Ireland [2003] 2 IR 321 recognised that retrospectively increasing punishment would offend the constitutional guarantee of trial in due course of law under Article 38. The Court distinguished this protection from Article 15.5.1°, which expressly prohibits retrospective legislative criminalisation but does not expressly address increased penalties.
This authority demonstrated that Irish constitutional law recognises the same underlying concern with retrospective punishment, without establishing any requirement to preserve historic sentencing attitudes.
Minister for Justice and Equality v Brennan [2007] IESC 21, [2007] 3 IR 732 and Minister for Justice and Equality v Balmer [2016] IESC 25, [2017] 3 IR 562 establish that Irish constitutional standards are not simply exported into foreign criminal proceedings.
The relevant inquiry is whether the anticipated treatment would be so offensive to fundamental Irish constitutional values that an Irish court could not properly order surrender. Differences between legal systems, such as the absence of jury trial in circumstances where Irish law would require it, do not automatically meet that threshold.
The Supreme Court also referred to the Hoge Raad decision of 7 September 2004, ECLI:NL:HR:2004:AP1534, as a comparative example of a demanding standard involving flagrant rights violations and the absence of an effective corrective remedy.
Lindsey v Washington and Calder v Bull
Lindsey v Washington (1937) 301 US 397 concerned legislation converting a formerly discretionary maximum into a mandatory sentence. Applying the ex post facto principle explained in Calder v Bull 3 US 386 (1798), the United States Supreme Court treated that change as impermissibly disadvantageous.
These authorities reinforced the focus on the legally prescribed punishment rather than a prediction of the sentence an individual judge would previously have selected. The judgment also referred to Article 20(1) of the Indian Constitution and Article 8 of the French Declaration of the Rights of Man as expressions of the broader anti-retroactivity tradition.
C. Convention rights in surrender and extradition
Ahmed v Austria and Soering v the United Kingdom
Ahmed v Austria (1997) 24 EHRR 278 and Soering v the United Kingdom (1989) 11 EHRR 439 provide the Article 3 background to protection against removal exposing a person to prohibited treatment abroad. The judgment connected this jurisprudence with Article 19 of the Charter, which expressly addresses removal, expulsion and extradition involving serious risks of death penalty, torture or other inhuman or degrading treatment.
These authorities illustrate that a state’s responsibility for its own surrender decision can arise because of the consequences abroad, without treating the foreign state as directly governed by the executing state’s legal instruments.
Othman v the United Kingdom
Othman v the United Kingdom (2012) 55 EHRR 1 established the stringent “flagrant denial of justice” standard for an Article 6 objection to removal. Ordinary procedural differences or defects sufficient to establish a domestic Convention breach do not necessarily prevent extradition. The anticipated failure must destroy the essence of the protected fair-trial right.
The present Court used this authority to explain why rights protection in surrender is not always identical to direct review of domestic proceedings.
Minister for Justice and Equality v Stapleton and Stapleton v Ireland
Minister for Justice and Equality v Stapleton [2007] IESC 30, [2008] 1 IR 669 establishes that Irish courts will not normally determine disputed Convention questions concerning another Convention state where that state can effectively address them itself.
The European Court of Human Rights endorsed that approach in Stapleton v Ireland (Application no. 56588/07, 4 May 2010), declaring the application inadmissible.
These authorities supplied an independent reason for rejecting the ECHR objection: the United Kingdom remained bound by the Convention, its courts could enforce Article 7, and the relevant sentencing issue had already received authoritative consideration.
Attorney General v Damache [2015] IEHC 339 supported the Court’s separation of two questions: whether the anticipated treatment meets the legal description of a flagrant denial of justice, and whether substantial grounds establish a real risk that the individual will experience it. This distinction became central to the judgment’s wider observations.
D. The Charter and the post-Brexit surrender framework
Minister for Justice and Equality v Walsh and Morgan v Ministry for Justice
Minister for Justice and Equality v Walsh [2024] IESC 9, [2024] IESC 47 generated the two references considered as Alchaster I and Alchaster II. Those proceedings concerned statutory changes to release arrangements in Northern Ireland and their compatibility with Article 49.
The background included Morgan v Ministry for Justice [2023] UKSC 14, in which the United Kingdom Supreme Court reversed the Northern Ireland Court of Appeal’s conclusion that the relevant provisions infringed Article 7 ECHR.
This history mattered because it demonstrated that a domestic resolution of the Convention issue does not automatically dispose of the separate Charter inquiry required of an executing EU court.
Alchaster I and Alchaster II
Alchaster I (Case C-202/24; judgment ECLI:EU:C:2024:649) and Alchaster II (Case C-743/24, ECLI:EU:2025:230), together with the opinions of Advocates General Szpunar and Spielmann, supplied the controlling TCA framework.
The Supreme Court drew three principal conclusions from them:
- Ordering surrender under the TCA implements EU law, so the executing Member State must comply with the Charter.
- The United Kingdom’s Convention membership is relevant but cannot, by itself, conclusively answer a Charter objection.
- A specific assessment of the individual’s situation is required, supported by objective, reliable, specific and properly updated information.
The Court also relied on Advocate General Szpunar’s description of the threshold for non-execution on fundamental-rights grounds as “extremely high”.
Aranyosi and Căldăraru and Petruhhin
Aranyosi and Căldăraru (Joined Cases C-404/15, C-659/15 PPU, ECLI:EU:C:2016:198) supplied the two-stage inquiry described in the judgment for European Arrest Warrant cases: identify relevant systemic or generalised deficiencies, or deficiencies affecting an identifiable group, and then examine the individual’s exposure.
Petruhhin (Case C-182/15, ECLI:EU:C:2016:630) supplied the single-stage, individualised approach applicable to the TCA objection. The appellant did not first have to establish systemic deficiencies before his particular circumstances could be examined.
The Court nevertheless stressed that a different procedural route does not necessarily produce a different result. The absence of a preliminary systemic-deficiency requirement does not turn the TCA into a low-threshold mechanism for resisting surrender.
Authorities on corresponding Charter and Convention rights
Rosneft (Case C-72/15), MAS and MB (Case C-42/17), Consob (Case C-481/19), and DELTA STROY 2003 (Case C-203/21) were cited through the discussion in Alchaster I. They supported the proposition that corresponding Convention guarantees provide a minimum level of Charter protection.
They were not presented as authorities deciding the particular historic-sentencing issue. Their significance was that Article 52(3) does not permit the executing court simply to assume that all possible questions about Article 49 have already been answered by Strasbourg jurisprudence.
R v Special Adjudicator ex parte Ullah and Centraal Israëlitisch Consistorie van België and others
R v Special Adjudicator ex parte Ullah [2004] UKHL 26 appeared in the discussion of the “mirror principle”: an approach favouring alignment with Strasbourg protection. Advocate General Spielmann had suggested such alignment in Alchaster II.
Centraal Israëlitisch Consistorie van België and others (Case C-336/19, ECLI:EU:C:2020:1031) was discussed in connection with evolving Charter interpretation. These authorities informed the Chief Justice’s concerns about interpretative uncertainty, rather than determining the appeal.
6. Analysis of the Court’s Legal Reasoning
A. Legal limits are not the same as historic sentencing expectations
The Court’s central reasoning was textual and structural. Neither Article 7 nor Article 49 refers to the sentence that a court would probably have imposed at an earlier date. Both refer to the penalty “applicable” when the offence was committed.
The appellant’s interpretation would require courts to reconstruct an earlier sentencing exercise, determine the likely outcome on hypothetical evidence, and impose that outcome as an additional ceiling. The Court considered this inconsistent with the wording and purpose of the guarantees.
That purpose includes preventing the state from changing the legal consequences of completed conduct to an offender’s disadvantage, including through measures targeting unpopular individuals or groups. It does not require judges to preserve indefinitely the social attitudes and understanding of harm prevailing decades earlier.
B. Accepted expert evidence did not answer the legal issue
The Minister’s acceptance of counsel’s prediction was not an admission of unlawful retrospectivity. The opinion established that the appellant might receive more years’ imprisonment now; it did not establish that the law had retrospectively authorised a heavier penalty.
The Court noted that the opinion did not explain why the controlling authorities were wrong, identify a contrary constitutional tradition, or conclude that the predicted sentencing approach itself infringed Article 7 or Article 49.
This distinction is important for future evidence: expertise about foreign sentencing outcomes cannot substitute for identifying the legal feature said to violate the protected right.
C. The surrender decision and the eventual prosecution are separate legal acts
The Charter applied to Ireland’s surrender decision because that decision implemented the TCA. It did not follow that the eventual prosecution and sentencing in England and Wales would themselves fall within EU law.
Indeed, the Court observed that the alleged offences would not have brought the prosecution within the Charter’s scope even before Brexit. Article 51 confines the Charter’s application to Member States when implementing Union law.
The resulting issue is therefore one of the executing state’s responsibility for surrender, not the direct application of Article 49 to the foreign sentencing court. The Supreme Court regarded the precise reach of that indirect protection as incompletely settled, but unnecessary to resolve here: the appellant failed even on the more demanding assumption that the anticipated sentencing approach had to satisfy Article 49 substantively.
D. Convention compliance is relevant, but not a Charter shortcut
The Court carefully preserved the difference between its ECHR and Charter analyses. Under the Convention, the approach in Minister for Justice and Equality v Stapleton ordinarily allows the requesting Convention state to determine and remedy Convention complaints.
Under the Charter, the executing court must undertake its own assessment in accordance with the CJEU’s guidance. Nevertheless, the United Kingdom’s enforceable Convention commitments, relevant domestic judgments and Strasbourg jurisprudence remain substantial evidence. Their relevance is not erased merely because none is individually conclusive.
E. “Real risk” concerns exposure, not a speculative chance of legal invalidity
The Court distinguished uncertainty about facts from uncertainty about law. If particular prison conditions are legally prohibited, the factual question may be whether the individual faces a real risk of encountering them. If a particular sentencing rule will certainly apply, the court must instead determine whether that rule breaches the applicable legal standard.
A possible future judicial finding of incompatibility is not itself a sufficient “real risk”. Otherwise, speculative legal arguments could displace the requirement to establish that the anticipated treatment is actually prohibited.
Where both issues arise, they should be addressed separately: identify the legally impermissible treatment, then assess the individual’s exposure to it.
F. Why no Article 267 reference was required
The possibility that Charter protection might sometimes exceed Convention protection did not, without more, create a reference-worthy uncertainty in this case. The relevant wording, authorities and absence of any substantiated contrary constitutional tradition all pointed in the same direction.
The Court’s concern about delay reinforced the need for a disciplined approach, but was not presented as an independent power to disregard a necessary reference. Its conclusion was that the legal answer was sufficiently clear.
7. Binding Outcome and Matters Left Open
The strongest and narrowest proposition established is that the sentencing development described in this case—tougher contemporary assessment within unchanged historic legal limits—did not justify refusing TCA surrender under Article 7 or Article 49.
Several broader observations require more caution:
- Charter alignment with the ECHR: O’Donnell C.J. favoured an interpretation of Article 52(3) under which more extensive protection would ordinarily come through Union legislation rather than divergent judicial interpretation. This was not necessary to the outcome and did not replace the CJEU’s existing guidance.
- A possible flagrancy threshold: The judgment suggested that objections involving Charter rights outside Article 19 might appropriately require a flagrant violation. It expressly recognised that the CJEU had not fully clarified the issue.
- Common constitutional traditions: The Court expected a person seeking a higher Charter standard to identify supporting material from those traditions. It did not establish that the Charter can never provide protection exceeding the Convention.
- Constitutional limits on evolving Charter interpretation: The hypothetical discussion concerning Article 29.4.5° did not determine any constitutional challenge in this appeal.
The decision is therefore best understood as applying the existing CJEU framework while inviting further clarification of its outer boundaries.
8. Practical Impact
Historic-offence sentencing
The judgment confirms that sentencing courts are not required to act as though they possess only the knowledge and attitudes available when an offence occurred. Historic legal limits remain binding, but contemporary appreciation of seriousness and harm may inform sentencing within those limits.
It does not decide the appellant’s guilt, prescribe his eventual sentence, or displace ordinary sentencing safeguards and remedies.
Preparation of surrender objections
Future objections will need to identify the precise legal or factual defect said to create prohibited treatment. A general prediction of a harsher outcome is insufficient. Relevant supporting material may include authoritative judgments, reliable reports, the applicable foreign legislation and specific evidence of the person’s likely exposure.
The judgment does not require every objection to be supported by an international report. Its point is the need for an objective and convincing foundation, rather than unsupported hypothesis.
Post-Brexit judicial cooperation
The decision rejects both automatic equivalence with intra-EU surrender and automatic distrust of the United Kingdom. TCA cases require the appropriate individualised assessment, but the agreement’s substantial foundation of mutual confidence must receive real weight.
Article 615 TCA’s urgency requirement is an important practical background. The Court sought to prevent repeated, weakly grounded objections from turning a preliminary surrender process into prolonged litigation that obstructs the determination of criminal charges.
Limits of the decision
A case involving a retrospectively increased statutory maximum, a new mandatory punishment, an additional punitive measure or materially altered release arrangements could present a different question. This judgment should not be treated as resolving every form of retrospective sentencing disadvantage merely because a custodial term remains below an old maximum.
9. Complex Concepts Simplified
- Retrospective punishment
- Changing the legal punishment for conduct after it occurred, to the offender’s disadvantage. This differs from a judge selecting a tougher sentence within the legal range already available.
- Applicable penalty
- The punishment legally authorised when the offence occurred, rather than the sentence an earlier judge would probably have chosen.
- Mutual trust
- The confidence supporting cooperation between legal systems. It is particularly strong within the EU, but the TCA also rests on substantial confidence.
- Real risk
- A sufficiently supported prospect that the individual will experience prohibited treatment—not simply the possibility that a legal argument might later succeed.
- Flagrant denial of justice
- A failure so fundamental that it destroys the essence of fair-trial protection, rather than an ordinary procedural defect.
- Article 267 reference
- A request by a national court for the CJEU to resolve a question of EU law necessary to deciding the case.
- Lighter-penalty principle
- Article 49 expressly provides that a later law prescribing a lighter penalty should apply. No such favourable legislative change was the issue here.
10. Conclusion
The Supreme Court drew a firm distinction between retrospectively changing the lawful punishment for an offence and applying contemporary sentencing judgment within historic legal limits. Only the latter was established here.
The appeal accordingly failed, without a CJEU reference. More broadly, the judgment confirms that TCA rights objections require independent judicial scrutiny and convincing support, while leaving open important questions about the precise reach of Charter protection against treatment following surrender.