Late Appeals after Guilty Pleas: Section 45 MSA Requires an Evidential Nexus to the Specific Offence; NRM Conclusive Grounds Respected but Not Determinative

1. Introduction

Nguyen, R. v ([2026] EWCA Crim 388) concerned two very late applications (around three years out of time) to appeal convictions entered on guilty pleas in separate Crown Court proceedings:

  • Bradford Crown Court (1 December 2021): failing to surrender to custody, contrary to section 6(1) of the Bail Act 1976 (four weeks’ imprisonment).
  • Wolverhampton Crown Court (9 March 2022): production of a Class B drug (cannabis) (twelve months’ imprisonment).

The applicant’s central contention in both cases was that he was, at the material times, a victim of trafficking/exploitation, such that (i) a statutory defence under section 45 of the Modern Slavery Act 2015 (“MSA 2015”) would have succeeded (or quite probably succeeded), and/or (ii) the prosecutions (particularly in Wolverhampton) were an abuse of process and infringed Article 4 ECHR (prohibition of slavery and forced labour).

Procedurally, the Court of Appeal had to decide (a) whether to extend time, (b) whether to admit fresh evidence under section 23 of the Criminal Appeal Act 1968, and (c) whether the convictions were unsafe despite guilty pleas.

2. Summary of the Judgment

The Court dismissed both applications. It refused to admit the applicant’s proposed fresh evidence (an August 2025 statement) as insufficiently credible/weighty and inconsistent with the contemporaneous record. Even taking that statement “at its highest”, neither conviction was arguable as unsafe.

  • Bradford (failure to surrender): no evidential foundation that trafficking-related compulsion prevented attendance on the trial date; therefore no realistic prospect that a section 45 defence would “quite probably” have succeeded, nor that “reasonable cause” under section 6(3) Bail Act 1976 was made out.
  • Wolverhampton (production of cannabis): although there was a later positive Conclusive Grounds decision for part of the relevant period, credibility issues and the absence of independent support for a compulsion nexus meant the Court could not say the section 45 defence would quite probably have succeeded. The applicant had been advised about the defence and made an informed choice to plead guilty. The abuse of process/Article 4 argument failed on the “public law” standard of review.

Because both appeals had no prospect of success, the Court held there was no purpose in extending time.

3. Analysis

3.1 Precedents Cited

R v Tredget [2022] EWCA Crim 108

This authority framed the modern approach to guilty-plea appeals: a voluntary and unequivocal guilty plea is a powerful indicator of safety, but convictions may still be unsafe where (among other things) the plea was equivocal, entered in ignorance of a viable defence that would quite probably have succeeded, or where a legal obstacle to prosecution (including abuse of process) existed. The Court treated these as established pathways but emphasised the central inquiry remains a single question: is the conviction unsafe?

R v MK [2018] EWCA Crim 667

The Court relied on R v MK [2018] EWCA Crim 667 for the burden and standard once section 45 is raised: if properly engaged, it is for the Crown to disprove the section 45 defence to the criminal standard. This underscored that the Court’s task was not to treat trafficking status as decisive, but to assess whether the defence would actually be engaged on the facts of the particular offence.

BTE [2022] EWCA Crim 1597

This was pivotal to the appellate threshold. Where section 45 is raised for the first time on appeal following a guilty plea, the Court must be satisfied the defence “would quite probably have succeeded”. The Court applied that test rigorously in both cases: theoretical availability was not enough; an evidential platform and a realistic prospect of success were required.

R v AFU [2023] EWCA Crim 23

The judgment treated R v AFU [2023] EWCA Crim 23 as the leading synthesis where section 45 was considered at the time of the plea. AFU explains that even if a plea is not vitiated by bad advice, a conviction may still be unsafe if the prosecution was an abuse of process, including for failures to comply with Article 4 investigative obligations. Importantly, the Court confirmed that the prosecutorial decision is reviewed on grounds “corresponding to public law grounds”—i.e., not a rehearing on the merits, but whether the decision to prosecute/continue was one properly open to the Crown.

R v AAD [2022] EWCA Crim 106, [2022] 1 Cr App R 19

This authority guided procedure and fact-finding: in section 45/trafficking cases, whether to determine matters on paper or by oral evidence is a “highly fact-sensitive” decision for the Court. Here, the Court took the applicant’s statement de bene esse and “at its highest” and decided it could properly resolve the applications without cross-examination, because even on that best-case basis the merits failed.

3.2 Legal Reasoning

(a) Guilty pleas, safety, and late appeals

The Court began from the orthodox position: a voluntary, unequivocal guilty plea strongly supports the safety of the conviction, and the Court will not lightly reopen factual issues years later. However, it accepted the established exceptions (as in R v Tredget [2022] EWCA Crim 108)—then assessed whether the applicant met the necessary evidential and legal thresholds.

(b) Section 45 MSA 2015: offence-specific compulsion and the “no realistic alternative” test

The Court’s reasoning emphasised several limiting features of section 45:

  • Trafficking history is not enough: the defence is not engaged merely because a defendant “has at some stage been trafficked”.
  • NRM outcomes are not determinative: a positive Conclusive Grounds decision does not decide criminal liability.
  • Nexus to the particular offence: there must be evidence that the offending occurred because of compulsion attributable to slavery/relevant exploitation.
  • Objective safeguard: the “reasonable person in the same situation… would have had no realistic alternative” test must be met.

This offence-specific approach drove both outcomes. In the Bradford matter, the Court found a near-complete absence of evidence linking trafficking to the failure to attend court on 18 March 2021. In the Wolverhampton matter, the Court accepted there was an evidential basis to claim modern slavery status at the time of the cannabis operation (via the later Conclusive Grounds decision), but held that credibility concerns, inconsistency with objective circumstances, and lack of independent support meant it still could not be said the defence would quite probably have succeeded.

(c) Section 45 applies to omissions (including failure to surrender)

A notable clarificatory point was the Court’s correction of the respondent’s initial contention that section 45 could not apply to the Bail Act offence because it was an omission. The Court pointed to section 45(6) MSA 2015: “references to an act include an omission.” This removes any categorical bar to section 45 applying to a failure-to-surrender type offence; the real question is evidential (was there relevant compulsion and no realistic alternative?).

(d) “Reasonable cause” under section 6(3) Bail Act 1976

The Court treated surrender to bail as fundamental to the administration of justice and applied an objective assessment. On the evidence, there was nothing showing the applicant was restrained/monitored, prevented from attending, or that he took steps to alert representatives or authorities. Accordingly, “reasonable cause” failed for essentially the same reason the section 45 theory failed: no evidence of an excusing circumstance operative at the time of non-attendance.

(e) Abuse of process and Article 4 ECHR: public law intensity of review

Applying R v AFU [2023] EWCA Crim 23, the Court accepted the general duty: credible trafficking indicators require careful prosecutorial consideration, continuing review, and appropriate investigation consistent with Article 4. But it stressed the appellate function: not to decide de novo whether prosecution was in the public interest, but whether continuing the case was properly open to the Crown (a public law-type standard).

On the facts, the Court found no basis to say the prosecution decision fell below required standards or disregarded Article 4 rights. Key factors included:

  • the applicant was legally represented and advised about section 45 in Wolverhampton;
  • he had prior NRM experience, including a discontinued prosecution, undermining claims of ignorance;
  • he had withdrawn cooperation with the NRM and indicated a desire to return to Vietnam at the time;
  • material inconsistencies and credibility issues were present, meaning it was open to the Crown to proceed.

(f) Fresh evidence and extensions of time

The Court treated the section 23 application and the extension-of-time applications as merit-sensitive. The applicant’s August 2025 statement was characterised as a retrospective narrative about advice/understanding, unsupported independently and difficult to reconcile with transcripts and counsel’s records. It was refused admission and, in any event, did not change the merits assessment. With no realistic prospect of success, the Court refused extensions of time as purposeless.

3.3 Impact

Although much of the legal framework was orthodox, the judgment is significant in consolidating a practical, evidence-driven approach to late guilty-plea appeals grounded in trafficking claims:

  • No “status-based” exculpation: even a respected Conclusive Grounds decision will not carry an appeal without evidence linking exploitation-related compulsion to the charged offence and satisfying the objective “no realistic alternative” test.
  • High appellate threshold after guilty pleas: where section 45 is first raised on appeal, the appellant must show it would quite probably have succeeded—a demanding filter that will often defeat speculative or purely “legal” arguments untethered from evidence.
  • Omissions are not excluded: section 45 can apply to omission offences (including failure to surrender), but only where the factual ingredients are present; this directs future litigants away from categorical arguments and toward the evidential nexus.
  • Abuse of process is not a re-trial of prosecutorial judgment: Article 4 arguments must meet the high threshold of showing the prosecution decision was not properly open to the Crown; where defendants were advised, pleaded guilty, and credibility concerns existed, appellate intervention is unlikely.

4. Complex Concepts Simplified

  • Section 45 MSA 2015 (statutory defence): a legal defence for adults who commit an offence because they are compelled by slavery/exploitation, and where a reasonable person in the same situation would have had no realistic alternative.
  • “Compulsion” and “nexus”: it is not enough to show exploitation generally; the exploitation must be what drove the specific offence (or omission) charged.
  • NRM / Conclusive Grounds: an administrative finding that someone is (or was) a victim of modern slavery. Courts must respect it, but it does not decide whether the criminal defence is made out for a particular offence.
  • Abuse of process: a doctrine allowing proceedings to be stayed (or convictions treated as unsafe) where prosecuting would be unfair or would damage the integrity of justice—used here in connection with alleged failures to comply with Article 4 duties.
  • Public law grounds (in this context): the appellate court does not substitute its own view of prosecution merits; it asks whether the decision to prosecute/continue was one the prosecution could properly make.
  • Fresh evidence (section 23 CAA 1968): new material admitted on appeal only if it is credible/important enough to justify reopening the case; unsupported retrospective accounts may be rejected.

5. Conclusion

Nguyen, R. v confirms a disciplined approach to trafficking-based challenges to convictions following guilty pleas, especially when brought years late. The Court accepted that section 45 can apply even to omission offences (via section 45(6)), but insisted on an evidence-based link between exploitation-related compulsion and the specific offending, plus satisfaction of the objective “no realistic alternative” test. It also reaffirmed that Conclusive Grounds decisions are important but not determinative, and that abuse of process/Article 4 challenges are reviewed on a public law-type standard. In the absence of an evidential platform showing the defence would quite probably have succeeded—or that prosecutorial decision-making was outside permissible bounds—extensions of time and appeals will be refused.