Written by Witness statements and expert reports can decide the shape of a civil case. A witness statement tells the court what a person can say from their own knowledge. An expert report gives independent opinion evidence on a technical issue where the court needs specialist assistance. For litigants in person, the central task is to prepare evidence that is clear, relevant, compliant and filed on time.
Publication snapshot
- This guide explains the practical role of witness statements and expert reports in civil claims.
- It is aimed at litigants in person preparing evidence for small claims, fast track, intermediate track or multi-track proceedings.
- It highlights the main risks: missed deadlines, defective statements of truth, irrelevant material, expert evidence without permission, and evidence that strays into argument.
Why evidence matters
Civil litigation is not decided by the strength of a party’s belief. It is decided by pleadings, evidence, procedure and law. Witness statements and expert reports are two of the main ways evidence is put before the court.
A witness statement provides factual evidence. It should tell the court what the witness saw, heard, did, received, sent or otherwise knows. An expert report is different. It gives independent opinion evidence on a specialist issue that the judge cannot fairly resolve without expert assistance.
The key distinction
A witness gives facts from personal knowledge. An expert gives opinion within their expertise. A litigant in person should not confuse either document with a legal argument or closing submission.
Witness statements: the factual backbone of the case
A witness statement is a written statement signed by a person containing the evidence that person would be allowed to give orally. It is usually the witness’s evidence in chief at trial, unless the court orders otherwise.
The statement should be written in the witness’s own language, use numbered paragraphs, and follow the chronology where possible. It should explain what happened, when it happened, who was involved, and what documents support the account.
A witness may refer to matters of information or belief where appropriate, but the statement should identify what is from the witness’s own knowledge and what comes from another source. A litigant in person should avoid presenting hearsay, assumption, commentary or argument as if it were direct evidence.
A good witness statement
- Uses the witness’s own words and own knowledge.
- Follows a clear date order where possible.
- Uses numbered paragraphs.
- Refers to documents by page or exhibit reference.
- Separates fact from belief, inference and comment.
- Ends with the correct statement of truth.
A weak witness statement
- Reads like a skeleton argument.
- Includes accusations without evidence.
- Repeats the whole history without focus.
- Quotes large volumes of documents unnecessarily.
- Contains new allegations not pleaded or previously raised.
- Misses the deadline or lacks a statement of truth.
Format, statement of truth and deadlines
Witness statements must comply with the court’s directions, the Civil Procedure Rules and the relevant practice directions. The court can control evidence by limiting the issues on which evidence is required, the nature of evidence, and the way evidence is put before the court.
The statement of truth is not a formality. A person who makes, or causes to be made, a false statement in a document verified by a statement of truth without an honest belief in its truth may face contempt proceedings.
Deadlines matter. If a party fails to serve a witness statement or witness summary for use at trial within the time specified by the court, the witness may not be called to give oral evidence unless the court gives permission.
Practical drafting rule
Draft the statement so that a judge can understand the evidence without guessing. Each paragraph should deal with one point, one event, or one document reference.
Expert reports: when specialist opinion is needed
Expert evidence is used where the court needs specialist help. This may arise in building disputes, valuation issues, medical evidence, technical defects, professional negligence, accountancy, foreign law, engineering or other specialist matters.
An expert is not a hired advocate. The expert’s duty is to help the court on matters within their expertise, and that duty overrides any obligation to the party who instructs or pays them. This is one of the most important points for litigants in person to understand.
A party may not call an expert or rely on an expert report without the court’s permission. When seeking permission, the party should be ready to explain the field of expertise, the issue the expert evidence will address, the proposed expert where practicable, and the likely cost.
Expert evidence is controlled evidence
Do not commission an expensive expert report on the assumption that it can automatically be used. The court controls whether expert evidence is permitted and may restrict the issue, expert field, number of experts or costs.
Track differences: small claims, fast track and beyond
The level of formality depends on the track, the order and the issue. Small claims are more informal, and the strict rules of evidence do not apply in the same way. However, that does not mean evidence can be disorganised or unsupported.
In small claims, the court’s standard directions commonly require parties to file and serve copies of documents they intend to rely on before the final hearing. Expert evidence in small claims still requires court permission.
In fast track, intermediate track and multi-track cases, formal witness statements and expert directions are more common. The consequences of non-compliance can also be more serious, including evidence exclusion, adjournment, costs orders or the need to apply for relief from sanctions.
Small claims
Usually more informal, but still evidence-led. Use concise statements, documents and photographs where they help prove the issue.
Fast track
More structured directions are common. Witness statements, disclosure and limited expert evidence may be tightly controlled.
Intermediate track
Evidence must be proportionate and organised. Expert evidence may be important but will be controlled by directions.
Multi-track
More complex evidence, expert issues and costs exposure may arise. Legal advice is particularly important.
A practical preparation route
Evidence preparation should begin with the court order and the live issues in the case. A litigant in person should not start by writing everything they want to say. They should start by identifying what must be proved.
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1Identify the issues.
List what the court must decide: liability, breach, causation, loss, remedy, credibility, valuation or another issue.
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2Match evidence to issues.
For each issue, identify which witness and which document proves or challenges the point.
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3Draft witness statements early.
Use first-person factual language and avoid argument, commentary and unnecessary quotation.
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4Check expert evidence before spending money.
Ask whether expert evidence is genuinely needed and whether court permission has been obtained or must be sought.
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5Serve and file on time.
Follow the court’s directions exactly. Keep proof of service and a clean copy of every statement and report.
Common pitfalls to avoid
Poor evidence preparation can weaken an otherwise arguable case. The most common problem is not that a litigant in person lacks sincerity. It is that the evidence is unfocused, late, argumentative or unsupported by documents.
Evidence risk checklist
- Missed deadlines: late witness statements or reports may be excluded unless the court grants permission.
- Argument in witness evidence: save legal submissions for a skeleton argument or oral submissions.
- Unsupported allegations: serious allegations require proper evidential foundation.
- Expert without permission: an expert report may be unusable if permission has not been obtained.
- Hearsay confusion: identify what is direct knowledge and what comes from someone else.
- Defective format: statements should be legible, numbered, dated, signed and verified properly.
- Overlong evidence: excessive detail can obscure the points the court actually needs to decide.
Litigants in person should also be cautious with online templates. A template may help structure a document, but it cannot identify the live issues, decide admissibility, or correct a statement that contains argument instead of evidence.
Final checklist before serving evidence
Before filing or serving witness statements or expert reports, check the documents against the order, the rules and the issues in dispute.
- Directions checked: have you read the latest order and diarised every evidence deadline?
- Issues identified: does each statement address a live issue in the case?
- Own knowledge separated: does the witness distinguish personal knowledge from information or belief?
- Documents referenced: are key documents referred to clearly by page, exhibit or date?
- Statement of truth included: is the statement signed, dated and verified in the correct form?
- Expert permission checked: has the court given permission for the expert evidence relied on?
- Expert duty respected: does the report acknowledge the expert’s duty to the court?
- Costs considered: are expert fees proportionate to the value and importance of the issue?
- Service proved: can you show when and how the evidence was served?
- Trial preparation done: can you take the judge to the relevant paragraph, document and page quickly?
The closing point
Strong evidence is disciplined evidence. A clear witness statement and a properly permitted expert report can help the court understand the case. Unfocused, late or argumentative evidence can do the opposite.