Defending a defamation claim in the UK: your options

Someone has accused you of publishing a false statement that damaged their reputation. You have received a "letter before claim" or a defamation lawsuit. What happens next? And do you have a defence?

The UK Defamation Act 2013 reformed defamation law fundamentally. It raised the bar for claimants (they must prove "serious harm"), created new statutory defences, and introduced the "single publication rule" which reset the clock. Most importantly, it gives defendants several strong ways to fight back, even if the statement is partially false.

This guide explains what the claimant must prove, which defences are available to you, the pre-action and court processes, and the real cost exposure you face.

The short version

A claimant suing for defamation must prove that you published a false statement about them, they are identifiable from it, and it caused "serious harm" to their reputation. You can defend yourself by proving the statement was true, you honestly believed it was a matter of public interest, it was an opinion (not fact), or it was protected by privilege. You have one year from first publication to be sued. You must respond to a "letter before claim" within 14 days, and if sued, file a defence within 14 days of service. Costs can exceed £200,000 even for a defended claim.

At a glance

What the claimant must prove

Before you worry about a defence, understand what the claimant must establish. They cannot simply prove the statement was false. Under the Defamation Act 2013, they must prove all of the following:

1. The statement was published. Publication means communicated to at least one person other than the claimant. A private email to the claimant is not published. A post on social media, a blog, an email to a colleague, a spoken statement to a third party, or a broadcast all count. You published a statement if you wrote or said it, and also if you repeated it knowing it was defamatory.

2. The statement refers to the claimant. The claimant must be identifiable, though not necessarily by name. A description (e.g., "the manager at the High Street branch") can be enough if it clearly points to them. If your statement could refer to multiple people, it is less likely to succeed.

3. The statement is defamatory. Broadly, a statement is defamatory if it lowers the claimant in the estimation of right-thinking members of society, or deters them from associating with the claimant. Accusations of dishonesty, criminal conduct, incompetence, or illness can all be defamatory.

4. The statement is false (subject to your defences). You have not admitted falsity if you have a valid defence. That is the point of defences.

5. Serious harm. This is the filter introduced by the 2013 Act. The claimant must prove that the statement has caused, or is likely to cause, serious harm to their reputation. A trivial insult or a statement affecting only a small group is not enough. The court will consider whether the statement reached a wide audience, whether the claimant's reputation was already damaged, and the gravity of the accusation.

If the statement was about a business, the claimant must prove that it has caused, or is likely to cause, serious financial loss. This is a higher bar than mere reputation harm.

Defamation Act 2013: the modern framework

The 2013 Act modernised defamation law. It introduced the serious harm test, reformed the available defences, and added the single publication rule. It also created a new defence for website operators.

The Act preserved some old law (privilege, innocent dissemination, offer of amends from the 1996 Act) but replaced the old defences of "justification" (now truth), "fair comment" (now honest opinion), and "Reynolds privilege" (now public interest).

The 2013 Act applies to all publications and utterances on or after 1 January 2014. If you are being sued for something said before that date, older law may apply.

Step 1: Acknowledge the letter before claim (pre-action protocol for defamation)

Before a claimant sues, they should send you a "letter before claim" setting out the defamatory statement, how it harms them, and what they want (usually a retraction, apology, damages, and costs).

You must respond within 14 calendar days. You can:

• Accept the claim and make an offer to settle.
• Reject it and set out your defence.
• Ask for clarification or more information.

Even if you believe you have a strong defence, it is worth responding promptly. Failure to reply may result in costs sanctions and suggests to the claimant that you are not taking the matter seriously.

If you believe you acted reasonably and in good faith (for example, you checked sources before publishing), say so. If you have a defence, hint at it: "We believe the statement was true" or "We believe this was a matter of public interest." Do not provide a full legal argument, but be substantive enough to show you are engaged.

Defence: Truth (section 2)

The most powerful defence is truth. Under section 2 of the Defamation Act 2013, it is a complete defence to prove that the statement (or the substantial truth of it) is true.

You do not need to prove every word. If you said "John was convicted of fraud in 2019" but he was convicted in 2018, the slight inaccuracy does not defeat the defence if the substance is true.

What does "substantially true" mean? The test is whether any reasonable reader would regard the statement as significantly different in its effect on the claimant's reputation from the true version. If the substance is damaging and accurate, minor discrepancies are forgiven.

How to prove truth:

• Documents (contracts, invoices, court judgments, public records).
• Witness evidence (emails, messages, testimony).
• Expert reports (if a technical claim requires expertise).
• Public records (court websites, Companies House, the Land Registry).

Courts are strict about evidence. Hearsay ("Someone told me") is weak. Contemporaneous documents are strong.

Common pitfalls:

• Assuming an accusation is true because "everyone says so." Public reputation is not proof. You must produce real evidence.
• Mixing fact and opinion. "He was convicted of fraud" is provable fact. "He is a fraudster" blurs fact and opinion; truth is a harder defence here because you are invoking a broad character judgment.

Defence: Honest opinion (section 3)

The old defence of "fair comment" has been replaced by "honest opinion."

Under section 3, it is a complete defence to prove that:

1. The statement was a statement of opinion (not a false assertion of fact).
2. The opinion was on a matter of public interest.
3. The person making the statement held the opinion honestly (the "honest" test replaces the old "malice" test).

Statements of opinion vs. fact: A statement of opinion is a value judgment. "The film was terrible," "His argument is weak," or "She handled the complaint badly" are opinions.

A false assertion of fact is different. "He stole from the company" asserts a fact. "He behaves like a thief" is more borderline (implied fact of dishonesty, but also shaded as opinion).

The defence applies to pure opinions and implied factual assertions that a reasonable reader would understand as expressions of view, not assertions of concrete fact.

Malice (old) vs. honesty (new): You do not need to prove that the opinion was correct or even reasonable. You only need to prove you held it honestly. Malice (old test) meant spite or recklessness; "honest" means you genuinely believed what you said.

If you say, "His food is disgusting" about a chef's restaurant, you are expressing an opinion. The opinion is subjective. It is honesty that matters: did you genuinely think so?

Public interest requirement: The opinion must be on a matter of public interest. Reviews of public services (schools, hospitals, police), political statements, and comments on public figures are clearly public interest. Personal attacks on private individuals for private reasons (a neighbourhood dispute, a family row) are not.

Defence: Publication on a matter of public interest (section 4)

Section 4 creates a broad defence for statements about matters of public interest, replacing the old "Reynolds privilege."

You can defend yourself if you prove:

1. The statement was published about a matter of public interest.
2. You reasonably believed publishing it was in the public interest.

You do not have to prove the statement is true. You do not have to have conducted an investigation. But you must have a reasonable belief that publishing was in the public interest.

What is public interest?

• Local government spending and accountability.
• Police conduct and criminal investigations.
• Public health and safety.
• Business conduct affecting consumers.
• Public figures and their conduct.
• Charities and their use of funds.

The reasonable belief test: You need to show that, at the time of publication, you had a reasonable belief that the statement was in the public interest to publish. The court will consider:

• What you knew at the time.
• How urgent the matter was.
• Whether you checked sources.
• Whether you asked the claimant for comment (if time allowed).
• Whether the statement was clearly marked as allegation or unverified claim.

You need not be a journalist. A member of the public raising a matter of public interest can use this defence. But if you were reckless (published without any basis, or ignored obvious signs of falsity), the court may find your belief was not reasonable.

Defence: Privilege

There are two types of privilege: absolute and qualified. Both are complete defences.

Absolute privilege: Some statements are absolutely privileged. No matter how false or malicious, no claim can succeed. Absolute privilege covers:

• Statements in Parliament.
• Statements in court (by lawyers, parties, witnesses).
• Government reports and papers laid before Parliament.
• Fair, accurate, and contemporaneous reports of court proceedings.

If you quote a statement made in court accurately, you are protected. If you quote what an MP said on the floor of Parliament, you are protected.

Qualified privilege: Qualified privilege applies to statements made in certain contexts where the speaker has an interest or duty to communicate, and the recipient has an interest in hearing.

Examples include:

• Employment references (you are speaking at the employer's request).
• Complaints to police or regulatory bodies.
• Statements on matters where you have a legal, moral, or social duty to speak.
• Fair and accurate reports of public meetings, court proceedings, or parliamentary business (even if not absolutely privileged, qualified privilege may apply).

Qualified privilege can be lost if you acted with malice (knowledge of falsity, recklessness, or spite). You must act reasonably and not go beyond what is necessary.

Defence: Offer of amends (Defamation Act 1996)

If you made an unintentional defamatory statement, you can make a formal "offer of amends" under the Defamation Act 1996. This requires:

1. Publishing a correction as soon as practicable.
2. Publishing an apology.
3. Paying compensation as assessed by the court (if the parties cannot agree).

If you make this offer and the claimant accepts, the claim ends, and you are protected. If the claimant rejects it, you can use the offer as evidence that the statement was unintentional.

This defence is useful if you published something you believed to be true at the time, but later discovered it was false and want to limit damage and costs.

Defence: Operators of websites (section 5)

Section 5 provides a defence for operators of websites who host third-party comments (such as website moderators, social media platforms, or forum owners).

The operator is not liable for a defamatory comment posted by another user if:

1. The operator did not post the comment.
2. The operator took no steps to create or edit the comment in a way that made it more defamatory.
3. The operator was not aware (or had no notice) that the comment was defamatory.
4. After becoming aware, the operator acted expeditiously to remove or disable access to the comment.

This defence protects moderators and platform operators from being treated as publishers of every user post. But it does not protect an operator who edits a comment to make it more damaging, or who leaves a defamatory comment up after being notified.

Defence: Innocent dissemination

If you repeated a defamatory statement without knowing it was false and you had no reason to suspect, you may have a defence under the old law. You believed it came from a reliable source, you had not adopted it as your own, and you acted reasonably.

This defence is narrower under the 2013 Act, but it may still apply in some cases. An example is a journalist who quotes a public statement or a report without verifying it, if the source was reliable and the context made clear it was a report, not the journalist's own assertion.

Single publication rule (section 8) and 1-year limitation

The single publication rule (section 8) is important. Before 2013, each time an article was republished (e.g., a webpage was accessed again, or a tweet was retweeted), the limitation period restarted. This meant a claimant could sue many years later.

Now, the cause of action arises only once, when the statement is first published. Any subsequent access to it (a repeat publication of the same material by the same publisher) does not restart the clock.

A claimant can sue only within one year of first publication.

What counts as "first publication"? The date you first published the statement, whether on the internet, in print, or orally. If you update an article, the first publication date is the date you first published the original material, not the date of the update.

Exceptions: If you publish substantially new material (a new article, not a re-post of the old one), the clock may restart for that new publication.

This rule helps defendants. An old blog post or tweet is not a standing invitation to be sued indefinitely. After one year, you are safe.

Step 2: File acknowledgment (N9) and defence (N9B)

If you are served with a claim, you have 14 days to file an acknowledgment of service (Form N9). This tells the court and the claimant that you have received the claim and will defend it.

You then have 28 days from service to file your defence (Form N9B). In your defence, you must:

• Admit the parts of the claim that are true.
• Deny the parts you dispute.
• Set out the defence(s) you are relying on.

For example: "The defendant admits that the statement was published on 15 March 2025. The defendant denies that it is false. The defendant relies on the defence of truth under section 2 of the Defamation Act 2013 and will prove the statement at trial."

Do not be vague. Courts dislike evasive defences. Be specific about which parts you deny and on what basis.

Your solicitor or barrister will draft the defence, but you must instruct them on the facts.

Damages and costs exposure

Defamation damages are assessed in several ways.

General damages: The court awards general damages for loss of reputation. The sum depends on the seriousness of the allegation, how widely it was published, the claimant's status, and the impact on them. Awards for individuals range from £1,000 (a published insult with limited reach) to £30,000 or more (a serious allegation published widely about a professional). Awards for false allegations of criminal conduct can be higher.

Special damages: If the defamatory statement caused financial loss (e.g., a false claim that you violated a licence caused you to lose clients), you can claim special damages. These are calculated precisely, with documentary proof.

Exemplary damages: In rare cases (if you behaved with recklessness or spite), the court may award exemplary damages to punish you.

Costs: This is the big exposure. Defamation claims are expensive. Legal costs (solicitor and barrister) can reach £100,000 or more per side, even for a defended claim. Court fees, expert reports, and trial time add up.

If you lose, you pay your own costs and a large part of the claimant's costs. If you win, the claimant usually pays your costs, but the court has discretion.

Many defamation cases settle before trial. The claimant's legal team will often offer a settlement: a retraction, an apology, and a modest sum (£5,000 to £50,000 depending on circumstances) to avoid trial. If the cost of defending at trial exceeds the settlement offer, settlement may be wise.

Common misconceptions

Myth: "If I said it on my own social media, it is private and not published." No. Anything posted on social media (Twitter, Facebook, Instagram, LinkedIn, etc.) is published. Even a post to "friends only" is published to those friends. One republication is enough.

Myth: "If I say 'allegedly' or 'I heard,' I am protected." Not automatically. Using the word "allegedly" signals you are not asserting fact, but if you name someone and make a serious accusation, even with caveats, a court may find it is still defamatory. The question is how a reasonable reader would understand it.

Myth: "Truth is always a complete defence." True. But you must prove it. If you cannot produce evidence (documents, witnesses), the defence fails. Belief is not enough.

Myth: "Public figures have no rights in defamation." Public figures do have rights, but the threshold for serious harm is higher, and defences (especially public interest) are easier to establish.

Myth: "The claimant has to wait one year to sue." No. The claimant has one year to sue from the date of publication. They can sue immediately, but only within one year. After one year, the claim is barred.

Related concepts

• Understanding slander and libel
• Reputational harm: civil wrongs beyond defamation
• Malicious falsehood (injurious falsehood)
• Pre-action protocol for defamation claims
• Defamation costs: what you really pay
• Privacy vs defamation: where the line is
• Statement in open court: absolute privilege explained
• Reporting on public interest: Reynolds privilege and section 4
• Corrections, apologies, and offers of amends
• Defamation claims: procedural roadmap from letter to judgment

Sources

• Defamation Act 2013 (UK legislation, full text)
• UK Justice Gov: Defamation Law (Ministry of Justice, guidance)
• Citizens Advice: Defamation (consumer information)

Written by Peter Kolomiets, founder of CaseCalm. UK content reviewed 2026-05-28.

This page provides information about defending UK defamation claims. It is not legal advice. If you are facing a defamation claim, seek advice from a qualified solicitor or barrister specialising in defamation law.