UK Defamation Law vs US Defamation Law: Why the UK Is More Claimant-Friendly

UK and US defamation law are built on fundamentally different foundations. The UK's Defamation Act 2013 is one of the most claimant-friendly defamation regimes in the common law world. US law, shaped by the First Amendment and the Supreme Court's decision in New York Times v Sullivan (1964), is one of the most defendant-protective. Understanding the differences matters for anyone who has been defamed by a US-based publisher, or by content that circulates on both sides of the Atlantic.

The Foundational Difference: Burden of Proof

The single most important difference between UK and US defamation law is who bears the burden of proof on the question of truth.

• UK law: The defendant bears the burden of proving that the defamatory statement is substantially true. Under section 2 of the Defamation Act 2013, truth is a defence — but the defendant must establish it. If the defendant cannot prove the statement is true, the claimant succeeds (assuming serious harm is established).
• US law: The claimant bears the burden of proving falsity. This reversal makes it significantly harder for US claimants to succeed, particularly in cases involving public figures or matters of public concern.

The Actual Malice Standard: A US Concept With No UK Equivalent

The most significant protection for defendants in US defamation law is the "actual malice" standard established by the US Supreme Court in New York Times Co v Sullivan 376 US 254 (1964). Under this standard, a public official (and later, any public figure) must prove not only that the statement was false, but that it was made with "actual malice" — meaning the defendant either knew the statement was false, or acted with reckless disregard for its truth or falsity.

This is an extraordinarily high bar. It effectively requires claimants to prove what was in the defendant's mind at the time of publication — something that is extremely difficult to establish without direct evidence of deliberate fabrication. Many US defamation claims by public figures fail at this stage.

UK law has no equivalent standard. All claimants — whether celebrities, politicians, corporate executives, or private individuals — pursue claims under the same Defamation Act 2013 framework. There is no additional burden for public figures beyond the standard serious harm test.

The First Amendment: Freedom of Expression on a Different Scale

The US First Amendment provides constitutional protection for freedom of speech and the press that has no direct equivalent in UK law. The Human Rights Act 1998 incorporates Article 10 of the European Convention on Human Rights into UK law, providing freedom of expression protections — but these are balanced against other Convention rights, including Article 8 (right to private life). UK courts conduct a structured proportionality exercise when weighing expression against reputation and privacy. US courts, by contrast, give the First Amendment an almost absolute character in many contexts, particularly in relation to statements about public figures and matters of public concern.

The Serious Harm Test vs the US Publication Requirement

UK law requires a claimant to show that the publication caused or was likely to cause serious harm to reputation — a threshold established by the Supreme Court in Lachaux v Independent Print Ltd [2019] UKSC 27. This is a meaningful threshold, but it is far lower than the actual malice standard that US public figure claimants must clear.

US law applies a simple publication requirement (one person must have read the statement) with no standalone harm threshold — but combines this with the falsity burden and actual malice standard to make the overall claim much harder to establish.

Libel Tourism and the Section 9 Jurisdiction Test

The UK was historically criticised for being a "libel tourism" destination — a jurisdiction where wealthy claimants would bring claims that had only a tenuous connection to England and Wales, exploiting the claimant-friendly law. The Defamation Act 2013 addressed this through section 9, which requires UK courts to be satisfied that England and Wales is "clearly the most appropriate place" to bring a claim before accepting jurisdiction against defendants not domiciled in the UK or a Lugano Convention state. The US responded earlier by passing the SPEECH Act (2010), which prevents US courts from enforcing foreign defamation judgments that do not meet First Amendment standards.

Practical Implications for Cross-Border Cases

If you have been defamed by content that originated in the United States and circulates in the UK, the key questions are: Where was the statement published (i.e. where was it read)? Where did you suffer reputational harm? Does the defendant have assets in a jurisdiction where a UK judgment can be enforced? We advise clients on cross-border defamation strategy, including the choice of jurisdiction, enforcement options, and the interaction between UK proceedings and US law.

Related Reading

Defamation solicitor vs going directly to a barrister | UK Defamation Law Guide | Serious Harm (Glossary)