When a story about someone in the public eye is followed by talk of lawyers, the underlying rules are rarely explained. This article sets out how the Defamation Act 2013 shapes libel claims: what a claimant has to show, what a publisher can rely on, and why time limits matter.
What does the Defamation Act 2013 actually cover?
The Act is a short statute, with 17 sections according to its contents page on legislation.gov.uk. It deals with the core test for a claim (serious harm), four main defences or protections (truth, honest opinion, publication on a matter of public interest, and the position of website operators), the single publication rule, and a handful of procedural matters such as whether a trial is heard with a jury and whether a court can order a summary of its judgment to be published.
It does not create a new offence and it does not decide any individual dispute. It sets out the framework a court applies when someone says a published statement has damaged their reputation. Whether a particular statement is defamatory, and whether a defence works, depends on the exact words, the context and the evidence.
The Act applies to claims in England and Wales in the form described here. Scotland and Northern Ireland have their own arrangements, so this guide should not be read as a description of every UK nation.
The serious harm threshold: why not every insult is a libel
Section 1 sets the entry point. It says a statement is not defamatory unless its publication has caused or is likely to cause serious harm to the reputation of the claimant. A claim therefore starts with reputation, not with offence or embarrassment.
For companies there is an additional hurdle. Under section 1(2), harm to the reputation of a body that trades for profit is serious harm only if it has caused, or is likely to cause, the body serious financial loss. A business cannot rely on hurt feelings, because it has none; it must point to real or likely financial damage.
This threshold matters for public figures too. A rude remark, a joke at someone’s expense or a harsh review might be unwelcome, but the test asks about the effect on reputation, not on pride.
Is it a defence that a statement is true?
Yes. Section 2 provides that it is a defence for the defendant to show that the imputation conveyed by the statement complained of is substantially true. Three details are worth noting:
- The focus is on the imputation, the meaning an ordinary reader would take from the words, not simply the literal wording.
- The truth has to be “substantially” true. Minor inaccuracies do not necessarily defeat the defence.
- Where a statement carries two or more distinct imputations and one cannot be shown to be substantially true, the defence does not fail if the remaining imputations do not seriously harm the claimant’s reputation, having regard to those that are shown to be true.
Section 2 also abolishes the old common law defence of justification, replacing it with this statutory version.
Honest opinion: where commentary and criticism sit
Section 3 protects opinion. It applies to criticism of films, albums, performances, fashion choices on a stage, or public statements, provided three conditions are met, according to the text on legislation.gov.uk:
- The statement complained of was a statement of opinion.
- The statement indicated, in general or specific terms, the basis of the opinion.
- An honest person could have held the opinion on the basis of any fact that existed when the statement was published, or anything asserted to be fact in a privileged statement published before it.
The defence fails if the claimant shows that the defendant did not actually hold the opinion. Where the defendant published a statement written by someone else, it also fails if the claimant shows the defendant knew, or ought to have known, that the author did not hold it. Section 3 abolishes the old common law defence of fair comment.
This is why a review that explains its reasoning stands on firmer ground than a bare accusation. Readers can usually tell the difference: opinion explains what it is based on, while a statement of fact presents something as having happened. For more on telling the two apart in features and profiles, see our guide to reading a celebrity profile.
When a matter of public interest is involved
Section 4 gives a defence for publication on a matter of public interest. The defendant must show two things: that the statement was, or formed part of, a statement on a matter of public interest, and that the defendant reasonably believed that publishing it was in the public interest.
In deciding this, the court must have regard to all the circumstances of the case. Section 4(3) adds a specific rule: where the statement was an accurate and impartial account of a dispute to which the claimant was a party, the court must disregard any omission by the defendant to take steps to verify the truth of the imputation conveyed. Section 4 also abolishes the common law Reynolds defence.
The public interest in this sense is a legal question, separate from public curiosity. The same distinction runs through press regulation, which is covered in our piece on the Editors’ Code, privacy and public figures.
How the single publication rule limits old claims
The time limit is short. Under section 4A of the Limitation Act 1980, no action for libel or slander may be brought after the expiration of one year from when the cause of action accrued. Section 8 of the Defamation Act 2013 then addresses repeat publication.
The single publication rule applies where a person publishes a statement to the public (the first publication) and later publishes the same or a substantially similar statement. For limitation purposes, the cause of action is treated as having accrued on the date of the first publication. The rule does not apply if the manner of the later publication is materially different, and the court may consider matters such as the level of prominence given to the statement and the extent of the later publication. Section 8 also leaves the court’s discretion under section 32A of the Limitation Act 1980 untouched, which allows the time limit to be disapplied in some circumstances.
In practice, the rule prevents a news archive from creating a fresh claim each time an old article is viewed or re-hosted unchanged.
Illustrative arithmetic
Suppose an article is first published on 1 March 2026 and left unchanged on a website. Under the one-year rule, the limitation clock is treated as starting on that date, so the ordinary deadline falls around 1 March 2027. Leaving the page online through 2027 does not restart it. A materially different republication, such as a new prominent feature repeating the claim, could be treated differently. This is a simplified illustration only; real cases turn on their facts and the court’s discretion.
What about comments, posts and website operators?
Section 5 gives website operators a defence for statements posted by others. The operator can show that it did not post the statement. The defence can be defeated if the claimant shows that they could not identify the person who posted it, that they gave the operator a notice of complaint, and that the operator did not respond as the regulations require. It also fails if the operator acted with malice in relation to the posting. Moderating user content does not, by itself, remove the defence.
The notice of complaint must set out the complainant’s name, the statement and why it is defamatory, and where it appears on the site.
Quick reference: the main defences compared
| Provision | What it protects | What the defendant must show |
|---|---|---|
| Section 2 | Truth | The imputation is substantially true |
| Section 3 | Honest opinion | Opinion, basis indicated, an honest person could hold it |
| Section 4 | Public interest | Matter of public interest and a reasonable belief that publishing was in the public interest |
| Section 5 | Website operators | The operator did not post the statement, subject to the notice process |
Defamation, privacy and data protection are different things
A libel claim concerns reputation. A privacy complaint concerns intrusion into private life, and can arise even where everything published is true. Data protection is a third regime again, and it contains its own treatment of journalism, explained in our article on the journalism exemption. Readers who want to raise a concern about coverage, without going to court, can also look at the routes for complaining about media coverage.
Reading libel headlines with a clearer eye
The Defamation Act 2013 answers a few repeated questions: has there been serious harm, can the publisher show truth, opinion or public interest, and has the claim been brought in time. A threat of legal action is not a finding, and a claim being issued is not proof that a statement was untrue. Only a court decides, and many disputes are resolved before reaching one.
This article gives general information based on published legislation, not legal advice. Anyone affected by a specific publication should seek advice from a qualified solicitor.
Sources: legislation.gov.uk (Defamation Act 2013, contents); legislation.gov.uk (Defamation Act 2013, section 1: Serious harm); legislation.gov.uk (Defamation Act 2013, section 2: Truth); legislation.gov.uk (Defamation Act 2013, section 3: Honest opinion); legislation.gov.uk (Defamation Act 2013, section 4: Publication on matter of public interest); legislation.gov.uk (Defamation Act 2013, section 8: Single publication rule); legislation.gov.uk (Limitation Act 1980, section 4A)
