This guide is maintained as a current resource for September 2026 and covers only the laws of England and Wales. Information is for general guidance, not legal advice. Consult a qualified solicitor for advice specific to your situation.
Discover what evidence is needed to prove a case in England and Wales. This comprehensive guide explains legal standards of proof, types of admissible evidence, relevance and burden of proof in criminal and civil proceedings, and practical tips for gathering and presenting proof in court.
In both criminal and civil law, evidence is fundamental to establishing the facts of a dispute and persuading a court or tribunal to decide in one party's favour. Whether the case involves an allegation of crime, a compensation claim, a contract dispute or a personal injury claim, the quality and type of evidence presented can determine the outcome.
This guide explains what evidence is, the standards required to prove a case, the kinds of evidence commonly used, how evidence must be presented in England and Wales, and the practical steps involved in gathering and presenting proof.
What Is Evidence?
In legal terms, evidence means any information that a party uses to persuade a fact‑finder - such as a judge, jury or tribunal - that a particular fact is true or untrue. Evidence can take many forms and must be both relevant and admissible to be considered by the court. Relevant evidence logically relates to an issue in the case; admissible evidence is permitted under the rules of court and has been obtained fairly and legally. Evidence that is irrelevant or unfairly prejudicial will be excluded by the court.
Standards of Proof: Different Rules for Civil and Criminal Cases
Criminal Cases
In a criminal prosecution, the burden of proof rests on the prosecution (usually the Crown Prosecution Service). The prosecution must prove every element of the offence beyond reasonable doubt before a conviction can be secured. This is the highest standard of proof in English law and reflects the serious consequences that criminal convictions can carry. A court will only convict if it is sure of the defendant's guilt, based on the evidence presented.
Civil Cases
In civil law - such as personal injury claims, contract disputes, and compensation actions - the claimant (the person bringing the case) bears the burden of proof. The required standard is the balance of probabilities, meaning the claimant must show that their version of events is more likely true than not (just over a 50% chance).
Types of Evidence
Witness Evidence
Oral or written witness evidence is a core component in both criminal and civil cases. Witnesses recount what they saw, heard or experienced. In criminal trials, this evidence is often given in court under oath. In civil cases, witness statements are usually exchanged and may be read or summarised in hearings.
Documentary Evidence
Documents including contracts, letters, emails, invoices, medical records, photographs and video recordings can be powerful evidence. Such documents must be authenticated - meaning the court must be satisfied they are genuine - before they are accepted.
Physical and Real Evidence
Physical items or objects relevant to the case (for example, a damaged product in a personal injury claim) are called real evidence. Courts will generally require that such items be properly labelled, recorded and preserved so their integrity can be demonstrated at trial.
Expert Evidence
Where a case involves technical issues outside the experience of judges or juries, expert evidence may be required. Experts can provide opinions - for example, on the cause of an injury, forensic analysis, or financial loss. Courts consider expert evidence carefully to ensure it is reliable and relevant.
Other Evidence
In criminal cases, certain evidence like confessions or hearsay (statements by someone who did not testify) may be admissible under specific rules, but prosecutors and defence teams must ensure such evidence meets statutory tests of reliability and fairness before it is heard.
Relevance and Admissibility of Evidence
Evidence must satisfy two key legal criteria:
- Relevance: Evidence must make a fact that matters to the case more or less likely than if the evidence did not exist.
- Admissibility: Even relevant evidence can be excluded if it was obtained improperly (for example, through coercion or a breach of legal rights) or if its prejudicial effect outweighs its probative value. Statutes such as the Police and Criminal Evidence Act 1984 (PACE) and the Criminal Justice Act 2003 govern the admissibility of certain types of evidence.
How Evidence Is Presented
In criminal cases, prosecutors and defence counsel present their evidence to a magistrates' court or Crown Court. Witnesses typically give evidence in court and may be cross‑examined. In civil proceedings, evidence is usually lodged with the court in advance and may be dealt with through written witness statements and documentary disclosure before any hearing.
Both courts have powers to control how evidence is presented, to exclude evidence that is not properly prepared, and to give directions on how specific types of evidence should be handled.
Practical Guidance on Gathering Evidence
Early and Careful Collection
Collect evidence as soon as possible. Witness memories fade, documents can be lost and physical evidence can degrade. Keeping a chronology, preserving original material and seeking legal advice on preserving digital evidence or sensitive material is good practice.
Documentation and Identification
Ensure all evidence is properly recorded, labelled and stored. For physical objects, continuity of custody - showing exactly who had possession of evidence at all times - is critical to prevent challenges at trial.
Supporting Witnesses
Encourage witnesses to prepare clear written statements while the events are fresh in their minds. These statements should include dates, times and consistent detail.
Common Questions About Evidence
Can evidence be excluded if it was obtained unlawfully?
Yes. In criminal cases, courts may exclude evidence if its admission would have an adverse effect on the fairness of the proceedings. Powers such as Section 78 of PACE allow judges to refuse improperly obtained evidence.
What happens if evidence is weak?
If key elements of a case cannot be supported by admissible evidence, the prosecution may not proceed or a civil claim may fail. For example, if the prosecution cannot prove an element of a crime beyond reasonable doubt, a conviction cannot stand.
Does a judge or jury weigh evidence?
In criminal trials, juries typically decide whether the prosecution has proved guilt beyond reasonable doubt. In civil trials, judges decide whether the balance of probabilities standard is met.
Key Takeaways
To prove a case in England and Wales, evidence must be:
- Relevant and admissible under court rules.
- Presented in a way that persuades the decision‑maker.
- Sufficient to meet the required standard of proof - beyond reasonable doubt in criminal cases, and on the balance of probabilities in civil cases.
Types of evidence include witness testimony, documents, physical items, recordings and expert opinions. Courts may exclude evidence that is unfair, improperly obtained or lacking sufficient probative value. Preparing strong evidence early and in accordance with legal requirements improves the likelihood of success, whether you are building a criminal prosecution, defending an allegation, or advancing a civil claim.
