# Defamation: elements, defences, and the Defamation Act 2013

> **Key takeaway:** Publication of defamatory meaning referring to claimant + serious harm (DA 2013 s.1; Lachaux). Defences: truth s.2, honest opinion s.3, public interest s.4, privilege. One-year limitation. Corporate: serious financial loss.

- **Jurisdiction:** England & Wales
- **Practice area:** Commercial
- **Last reviewed:** 2026-08-04
- **Interactive page:** https://kttclegal.info/library/notes/Commercial/defamation-overview
- **Keywords:** defamation, libel, Defamation Act 2013, serious harm, Lachaux, honest opinion, public interest, truth defence

## What is this about?

Defamation protects reputation against false defamatory publications. The Defamation Act 2013 reshaped the modern claim: a serious-harm threshold, a single-publication rule for internet material, and restated defences (truth, honest opinion, public interest). Libel (permanent form) and slander (transient form) remain distinct for some purposes.

## What is the core rule?

A claimant must show a defamatory statement referring to them was published to a third party and that it has caused or is likely to cause serious harm to reputation (Defamation Act 2013 s.1; for bodies trading for profit, serious financial loss — s.1(2)). Key defences include truth (s.2), honest opinion (s.3), and publication on a matter of public interest (s.4). Offer of amends and privilege (absolute/qualified) remain important. Limitation is generally one year.

## What are the elements or test?

1. Meaning: what meaning would a reasonable reader infer (natural ordinary meaning / innuendo)?
2. Defamatory tendency + reference to the claimant + publication to a third party
3. Serious harm (s.1) — evidence for individuals; serious financial loss for for-profit bodies
4. Defence analysis: truth, honest opinion, public interest, privilege, consent, offer of amends
5. Remedies: damages, injunction; consider s.12 summary of judgment and online intermediary issues

## Which authorities matter?

- **Defamation Act 2013, ss.1–4, 8** — Serious harm, truth, honest opinion, public interest defence, and single publication rule.
- **Lachaux v Independent Print Ltd [2019] UKSC 27, [2020] AC 612** — Supreme Court: serious harm is a fact-sensitive threshold requiring actual or likely serious harm, not a mere inferential gloss on meaning alone in every case.
- **Reynolds v Times Newspapers Ltd [2001] 2 AC 127 (historical) / Defamation Act 2013 s.4** — Public interest defence is now statutory; Reynolds remains background to responsible journalism concepts.
- **Sim v Stretch [1936] 2 All ER 1237** — Classic formulation of the defamatory tendency test (lowering in the estimation of right-thinking people), still a starting reference for meaning.

## How does this apply in practice?

Online publication, website operators, and s.5/s.10 intermediary protections need careful statutory reading. Corporate claimants face the serious financial loss limb. This note does not cover malicious falsehood or data protection claims, which may be alternative or concurrent routes.

## What are common pitfalls?

- Pleading defamation without particularising serious harm after Lachaux
- Treating 'comment' as honest opinion without the statutory opinion conditions
- Missing the one-year limitation period
- Suing the wrong publisher in a multi-platform republication chain without a publication strategy

## When would a practitioner use this?

Media pre-publication review, reputation complaints, and claim/defence drafting in libel actions.

## Quick reference

Publication of defamatory meaning referring to claimant + serious harm (DA 2013 s.1; Lachaux). Defences: truth s.2, honest opinion s.3, public interest s.4, privilege. One-year limitation. Corporate: serious financial loss.

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*Reference material from [KTTC Legal](https://kttclegal.info/), not legal advice. Work product supports instructing solicitors and barristers under their supervision. England & Wales.*