The Defamation Limitation Period: Why You Must Act Within 12 Months

UK defamation law operates a strict one-year limitation period. Miss it, and your claim is almost certainly extinguished — regardless of how serious the defamation was. But the one-year rule has important exceptions, the clock does not always start when you think it does, and there are circumstances in which courts will extend time. If you are worried you may be out of time, read this guide and then take legal advice immediately.

The Basic Rule: One Year from Publication

Under s.4A of the Limitation Act 1980 (as inserted by s.5 of the Defamation Act 1996), a defamation claim must be brought within one year of the date of publication. For online content, this is typically the date the content first appeared — the first time it was made available to the world.

This is a hard statutory deadline. Once it passes, the defendant can apply to have the claim struck out, and courts will generally do so. The burden is on the claimant to issue proceedings within time, and "I didn't know about my legal rights" is not a reason to extend time.

This is why acting quickly — even before you are certain you want to litigate — is critical. Early legal advice preserves all your options. Delay forecloses them.

The Single Publication Rule and When the Clock Starts

Under the single publication rule (s.8 Defamation Act 2013), the limitation period for online content runs from the date of first publication — not each time someone views or accesses the content. This reversed the old "multiple publication" rule under which every new reader's access constituted a fresh publication with its own limitation period.

The single publication rule means that an article published in January 2024 will have a limitation period expiring in January 2025 — even if it is still online, still being read, and still causing damage today.

However, the single publication rule does not apply where the defendant makes a materially different publication of substantially the same content. If a defendant retweets, re-posts, or substantially updates defamatory content, this can constitute a fresh publication with its own fresh limitation period. Your solicitor will assess whether this applies to your situation.

The Discovery Rule for Online Content

The most important exception to the basic rule is the discretionary extension available under s.32A of the Limitation Act 1980. Where the claimant did not know — and could not reasonably have known — that defamatory content had been published about them, a court can exercise its discretion to allow the claim to proceed out of time.

This is not automatic. The court will consider:

• The length of the delay and why it occurred
• The prejudice to the defendant of allowing a late claim
• The strength of the claimant's case on the merits
• Whether evidence has been lost or memories have faded
• The claimant's conduct once they discovered the publication

The discovery principle is most commonly argued where content was buried in obscure online forums, buried deep in search results, or published on platforms the claimant did not monitor. It is not a general safety net for claimants who simply delayed taking action despite knowing about the content.

The Wayback Machine Problem

The Internet Archive's Wayback Machine creates archived copies of web pages. These archives can complicate the limitation analysis in two ways:

• The Wayback Machine's archiving of a page constitutes a publication in its own right — if the archive is sufficiently "materially different" from the original (for example, it was cached on a different date), it may have its own limitation period.
• More commonly, Wayback Machine archives are used as evidence to establish when content was first published, which can be critical where the original has been deleted. Courts have accepted Wayback Machine evidence to establish publication dates.

Why Acting Before the Deadline Is Strategically Important

Even if you are still within the limitation period, the proximity of the deadline affects your negotiating position. A defendant who knows the limitation period will expire in two months has considerably less incentive to settle than one who faces a claim that could run for years. Acting with time to spare maximises your leverage and gives your solicitor the best chance of achieving a favourable settlement without litigation.

Defamation claims also require significant pre-action work under the Pre-Action Protocol for Defamation — exchanging detailed correspondence about the words complained of, the meaning alleged, and the harm caused. This process takes time, and starting it late reduces your options.

Related reading: Defamation time limits in the UK | How defamation disputes settle out of court | What evidence do I need for a defamation claim?