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Popoviciu v Curtea De Apel Bucharest (Romania) (Rev1) [2023] UKSC 39

Reviewed by Jennifer Wiss-Carline, Solicitor

Case citations

56 BHRC 313, [2023] 1 WLR 4256, [2023] WLR 4256, [2024] 1 All ER 1017, [2023] UKSC 39

Romanian authorities sought extradition of Mr Popoviciu following conviction for fraud. He alleged his trial was flagrantly unfair due to undisclosed corrupt relationship between the trial judge and a key prosecution witness. The Supreme Court addressed whether proving past flagrant denial of justice requires balance of probabilities or merely showing real risk.

Facts

Mr Gabriel Popoviciu was convicted in Romania for conspiring to fraudulently transfer state-owned land (Baneasa Farm) to a private company. He was sentenced to seven years imprisonment following trial before Judge Tudoran and appeal to the High Court of Cassation and Justice. A European Arrest Warrant was issued in August 2017 seeking his extradition from the United Kingdom.

During extradition proceedings, fresh evidence emerged alleging that Judge Tudoran had an undisclosed corrupt relationship with Becali, a key prosecution witness. Witnesses alleged Judge Tudoran had participated in illegal gambling with Becali, provided corrupt legal assistance, and received bribes.

Issues

The central issue was the standard of proof applicable in conviction extradition cases where a requested person alleges their trial involved a flagrant denial of justice contrary to articles 5 and 6 ECHR. Specifically, whether it suffices to show substantial grounds for believing there was a real risk of flagrant unfairness, or whether the requested person must prove on the balance of probabilities that such unfairness actually occurred.

Secondary Issue

Whether an effective remedy existed in Romania to challenge the conviction based on newly discovered evidence of judicial bias.

Judgment

Lord Lloyd-Jones, delivering the unanimous judgment, held that the High Court had applied the wrong standard of proof. In conviction cases, past facts must be proved on the balance of probabilities, not merely assessed as a real risk.

Because the trial and appeal process has already occurred, it constitutes past fact. Thus the question of whether it was flagrantly unfair is susceptible of proof. In our view, in a situation such as the present, it is for the appellant to establish, on a balance of probabilities, that the process of which he complains had, in fact, been flagrantly unfair.

The Court distinguished between proving historical facts and assessing future risks:

The law of England and Wales distinguishes between proof of a fact which has occurred and the assessment of the likelihood of the occurrence of a fact in the future.

The Court rejected extending the exception for torture evidence (from Othman v United Kingdom) to allegations of judicial bias and corruption:

The exceptional relaxation of the standard of proof in the case of evidence which may have been obtained by torture reflects the unique wickedness of torture and the abhorrence in which its corrupting influence is rightly held.

Implications

This judgment clarifies an important procedural point in extradition law. In conviction cases under the European Arrest Warrant scheme, requested persons alleging flagrant denial of justice based on past events must prove those facts on the balance of probabilities. The real risk standard applies only to assessment of future events in accusation cases.

The decision reinforces the distinction between historical fact-finding and prospective risk assessment, maintaining consistency with established Strasbourg jurisprudence while refusing to extend the narrow torture evidence exception to other forms of alleged judicial impropriety.

Although the appeal was ultimately dismissed due to withdrawal of the European Arrest Warrant, the Court delivered judgment to answer the certified question of general public importance and provide guidance for future cases.

Verdict: The appeal was dismissed pursuant to section 43(4) of the Extradition Act 2003 following withdrawal of the European Arrest Warrant. However, the Court ruled that the High Court had applied the wrong standard of proof; the correct standard in conviction cases is balance of probabilities, not real risk.

Source: opoviciu v Curtea De Apel Bucharest (Romania) (Rev1) [2023] UKSC 39

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To cite this resource, please use the following reference:

National Case Law Archive, 'Popoviciu v Curtea De Apel Bucharest (Romania) (Rev1) [2023] UKSC 39' (LawCases.net, April 2026) <https://www.lawcases.net/cases/opoviciu-v-curtea-de-apel-bucharest-romania-rev1-2023-uksc-39/> accessed 27 April 2026