Burden and Standard of Proof in English Law

Introduction

The burden and standard of proof are fundamental concepts in the law of evidence, determining which party must prove a fact and to what degree of certainty. English law distinguishes between the legal burden (the obligation to prove a fact in issue) and the evidential burden (the obligation to adduce sufficient evidence to raise an issue). The standard of proof differs between criminal and civil proceedings, reflecting the different consequences of each type of proceeding.

The Legal Burden

The legal burden (also known as the persuasive burden) is the obligation on a party to prove a fact in issue to the required standard of proof. The party who bears the legal burden on a particular issue will lose on that issue if they fail to discharge the burden.

In criminal proceedings, the general rule is that the prosecution bears the legal burden of proving every element of the offence beyond reasonable doubt. This rule, often expressed as the presumption of innocence, was established in Woolmington v DPP (1935), where Viscount Sankey LC stated that “throughout the web of the English criminal law one golden thread is always to be seen — that it is the duty of the prosecution to prove the prisoner’s guilt.”

The legal burden may shift to the defendant in certain circumstances. The defence of insanity must be proved by the defendant on the balance of probabilities. Statutory provisions may also impose a legal burden on the defendant, as in the case of reverse onus clauses, which require the defendant to prove a statutory defence or exception. The courts interpret reverse onus clauses strictly, and they may be challenged under Article 6(2) of the European Convention on Human Rights (the presumption of innocence).

In civil proceedings, the general rule is that the party who asserts a fact bears the legal burden of proving it. The claimant bears the burden of proving the facts necessary to establish their cause of action, while the defendant bears the burden of proving any defence.

The Evidential Burden

The evidential burden is the obligation to adduce sufficient evidence to raise an issue for the court or jury to consider. The evidential burden is not concerned with persuasion but with the production of evidence. If a party fails to discharge the evidential burden, the issue will not be put to the court or jury, and the opposing party may succeed without calling evidence.

In criminal proceedings, the evidential burden generally rests initially on the prosecution for every element of the offence. However, evidential burdens may shift to the defendant in respect of certain defences. For example, the defendant bears the evidential burden of raising the issue of self-defence or provocation; once sufficient evidence is adduced, the prosecution must disprove the defence beyond reasonable doubt.

The evidential burden is a matter for the judge to determine, not the jury. If the judge concludes that there is insufficient evidence to raise an issue, the judge will withdraw that issue from the jury’s consideration.

The Standard of Proof: Criminal Proceedings

The standard of proof in criminal proceedings is beyond reasonable doubt. The prosecution must prove every element of the offence to this standard. The test is well-established: the jury must be satisfied so that they are sure of the defendant’s guilt.

The standard of beyond reasonable doubt applies to all elements of the offence, but not to preliminary or procedural matters. Where the defendant bears the legal burden (as in the defence of insanity), the standard is the balance of probabilities — the defendant must prove the defence is more likely than not.

The Standard of Proof: Civil Proceedings

The standard of proof in civil proceedings is the balance of probabilities — the court must be satisfied that the fact in issue is more likely than not to have occurred. In Miller v Minister of Pensions (1947), Lord Denning described the standard as meaning that “if the evidence is such that the tribunal can say ‘we think it more probable than not,’ the burden is discharged.”

The House of Lords in Re B (Children) (Care Proceedings: Standard of Proof) (2008) confirmed that the balance of probabilities is the single civil standard and that there is no intermediate standard. The inherent probability or improbability of an event is relevant to the evaluation of evidence but does not alter the standard of proof.

In care proceedings under the Children Act 1989, the standard of proof is the balance of probabilities, even where the allegations are very serious (such as allegations of serious harm to a child). The court must evaluate all the evidence and decide whether the facts are proved on the balance of probabilities.

The Principle of Woolmington

The decision in Woolmington v DPP (1935) is a landmark in the law of evidence. The defendant was convicted of murdering his wife, and the trial judge directed the jury that it was for the defendant to prove that the shooting was accidental. The House of Lords quashed the conviction, holding that the prosecution must prove every element of the offence, including the absence of accident.

The principle established in Woolmington — that the prosecution bears the legal burden of proof in criminal proceedings — is a fundamental protection for defendants and a pillar of the common law system of criminal justice. The principle has been reinforced by Article 6(2) of the European Convention on Human Rights, which guarantees the right to be presumed innocent until proved guilty according to law.

Evidential Presumptions

Presumptions affect the burden of proof. Rebuttable presumptions of law (such as the presumption of legitimacy and the presumption of advancement) operate to shift the legal burden to the party seeking to rebut the presumption. Presumptions of fact (such as the presumption of continuance) are inferences that may be drawn from proved facts but do not shift the burden of proof.

Irrebuttable presumptions are rules of law that cannot be challenged by evidence. For example, section 50 of the Children Act 2004 provides that a child under the age of 10 cannot be guilty of a criminal offence — this is an irrebuttable presumption.

Conclusion

The burden and standard of proof are essential elements of the law of evidence, structuring the allocation of the obligation to prove facts and the degree of certainty required. The golden thread of the presumption of innocence, the allocation of the legal and evidential burdens, and the differing standards of proof in criminal and civil proceedings reflect the values and policy choices of the English legal system.