UK Negligence Law – Duty of Care, Breach, Defamation, and Court Considerations

UK negligence law is built around a simple idea: people and organisations can be legally responsible when they owe another person a duty of care, fail to meet the required standard, and cause legally recognised damage. The difficulty lies in deciding when a duty exists, what “reasonable care” requires in the circumstances, whether the breach actually caused the loss, and whether the type of damage falls within the scope of the defendant’s responsibility.

Defamation law addresses a different problem. It balances protection of reputation against freedom of expression. The Defamation Act 2013 made several important changes in England and Wales, including the requirement that a statement must cause—or be likely to cause—serious harm to the claimant’s reputation before it is actionable.

The older version of this article treated negligence and defamation as if they were parts of one assignment. They are separate areas of law, so this guide explains them in separate sections while keeping the original page’s two main subjects.

This article provides general information about the law of England and Wales and is not legal advice.

What Must a Claimant Prove in Negligence?

A negligence claim usually requires proof of four broad elements:

The defendant owed the claimant a duty of care.
The defendant breached that duty.
The breach caused the claimant’s loss.
The loss is legally recoverable and not too remote.

Each element matters. Careless behaviour alone does not automatically produce liability.

How Courts Decide Whether a Duty of Care Exists

Students are often taught the three-part Caparo formulation of foreseeability, proximity, and whether it is fair, just and reasonable to impose a duty. That formulation remains important in genuinely novel cases, but the Supreme Court clarified in Robinson v Chief Constable of West Yorkshire Police that courts do not mechanically apply a universal three-stage test to every negligence claim.

Where established authority already recognises a duty category, courts generally apply those existing principles.

Examples of familiar duty relationships include:

Drivers and other road users.
Employers and employees.
Manufacturers and consumers.
Doctors and patients.
Occupiers and lawful visitors.
Professionals and clients in appropriate circumstances.

Positive Acts and Omissions

UK negligence law generally distinguishes between causing harm through a positive act and failing to protect someone from harm caused by another source.

The Supreme Court has repeatedly emphasised that the law normally imposes duties not to cause harm, while duties to protect someone from third-party harm are more limited.

Exceptions can arise where the defendant:

Assumed responsibility for the claimant.
Created the source of danger.
Had control over a third party in circumstances recognised by law.
Was subject to a statutory or established common-law duty.

What Does Breach of Duty Mean?

Once a duty exists, the court asks whether the defendant fell below the legally required standard of care.

The ordinary standard is objective: what would a reasonable person have done in the circumstances?

The court does not normally ask whether the particular defendant personally thought their conduct was safe enough.

Factors Courts Consider When Assessing Breach

The standard of reasonable care is flexible. Important factors can include:

Foreseeability of Harm

A defendant is more likely to be negligent where a reasonable person would have recognised a real risk of the type of harm that occurred.

Magnitude of the Risk

A very small probability of injury may require fewer precautions than a substantial risk, although even a low-probability hazard can justify action if the potential harm is catastrophic.

Seriousness of Potential Injury

The law may require greater care where the claimant is known to be particularly vulnerable.

Cost and Practicality of Precautions

Courts consider whether reasonable steps could have reduced the risk. The law does not normally require defendants to eliminate every conceivable danger regardless of cost or practicality.

Social Utility

Emergency or socially valuable activities may affect what precautions are reasonable, although public benefit does not create a general immunity from negligence.

Is the Standard Subjective?

The basic negligence standard is objective, but the circumstances can modify what is expected.

For example:

Children are not always judged by the same standard as reasonable adults.
Professionals are assessed against standards relevant to the skill they profess.
A person who chooses to perform a skilled task cannot generally rely on personal inexperience to lower the standard owed to others.

So-called “subjective factors” are better understood as legally recognised characteristics of the situation rather than a general inquiry into what the defendant personally believed.

Professional Negligence

Professionals such as doctors, accountants, surveyors, solicitors, and engineers may owe duties requiring reasonable professional skill and care.

For medical diagnosis and treatment, the Bolam professional-practice test remains important: a doctor is generally not negligent if acting in accordance with a responsible body of professional opinion. Bolitho added that professional opinion must still be capable of withstanding logical analysis.

However, patient-advice duties are different. In Montgomery v Lanarkshire Health Board, the Supreme Court held that doctors must take reasonable care to ensure patients are aware of material risks of recommended treatment and reasonable alternatives.

The 2023 Supreme Court decision in McCulloch further clarified how the professional-practice test interacts with the question of which alternative treatments are medically reasonable enough to require discussion.

Pure Economic Loss

Negligence law is particularly cautious about claims for financial loss that is not consequential on physical injury or property damage.

The Supreme Court has reaffirmed that there is generally no duty of care simply to prevent another person from suffering pure economic loss.

An important exception involves assumption of responsibility, particularly in professional advice. Where a professional undertakes responsibility to provide reliable information or advice, a duty can arise if the claimant reasonably relies on it.

Scope of Duty

Even where negligent advice caused a loss in a factual sense, the defendant is not necessarily liable for every consequence.

In Manchester Building Society v Grant Thornton, the Supreme Court emphasised the need to identify the purpose of the duty. The court asks, in substance, what risks the defendant’s duty was supposed to protect the claimant against.

This prevents negligence law from making a professional responsible for losses outside the scope of the task they undertook.

Causation

A claimant normally needs to show that the breach caused the relevant injury or loss.

The starting point is often the “but for” question:

Would the damage have occurred but for the defendant’s breach?

If the answer is yes, factual causation may fail.

More complex cases can involve:

Multiple causes.
Loss of chance.
Material contribution.
Intervening events.

Remoteness

The defendant is not liable for every imaginable consequence of negligence. The type of damage must generally have been reasonably foreseeable.

The precise manner in which the injury occurred does not always need to have been predictable, but the broad type of harm must fall within the legally foreseeable risk.

Contributory Negligence

A claimant’s own lack of reasonable care can reduce damages under the Law Reform (Contributory Negligence) Act 1945.

This does not necessarily defeat the claim. The court can apportion responsibility and reduce damages by an appropriate percentage.

Occupiers’ Liability

The older article used outdated American-style labels such as “invitee” and “licensee.” English law is primarily governed by the Occupiers’ Liability Act 1957 for lawful visitors and the Occupiers’ Liability Act 1984 for certain non-visitors, including some trespassers.

Under the 1957 Act, an occupier owes lawful visitors a common duty of care to take reasonable care to see that they are reasonably safe in using the premises for the purposes for which they are invited or permitted to be there.

The 1984 Act imposes a more limited duty in defined circumstances toward people other than lawful visitors.

Psychiatric Injury

Claims for psychiatric harm are governed by additional control mechanisms because the law distinguishes between ordinary emotional distress and medically recognised psychiatric injury.

Cases may distinguish between primary victims, who were directly exposed to physical danger, and secondary victims who suffer psychiatric injury through witnessing injury to others.

The rules for secondary victims are restrictive and have been shaped by appellate decisions concerning proximity, relationship, and the circumstances of the shocking event.

Public Authorities

Public bodies are not automatically immune from negligence, but they are not automatically liable whenever they fail to prevent harm either.

Robinson rejected the idea of a general police immunity. At the same time, later cases such as Tindall have continued to emphasise the distinction between causing danger and failing to protect someone from a danger created by others.

What Is Defamation?

Defamation protects reputation against harmful false statements.

Traditionally, English law distinguishes between:

Libel – generally defamatory statements in permanent form, including most written and online publication.
Slander – generally spoken or transient defamatory statements.

The exact legal consequences can differ, but most modern online disputes involve libel.

The Serious Harm Requirement

Section 1 of the Defamation Act 2013 states that a statement is not defamatory unless its publication has caused or is likely to cause serious harm to the claimant’s reputation.

For a body that trades for profit, serious harm is not established unless the statement has caused or is likely to cause serious financial loss.

In Lachaux v Independent Print, the Supreme Court confirmed that this requirement involves examining the actual or likely impact of the publication rather than relying only on the tendency of the words in the abstract.

Who Can Bring a Defamation Claim?

Individuals can bring claims when the requirements of defamation law are met.

Companies and other bodies trading for profit can also sue, but section 1 sets the additional threshold of serious financial loss.

This was intended to reduce trivial or purely tactical claims by commercial organisations.

The Defence of Truth

Section 2 of the Defamation Act 2013 replaced the older common-law defence traditionally called justification.

A defendant has a defence if the imputation conveyed by the statement is substantially true.

Honest Opinion

Section 3 provides a statutory defence of honest opinion.

Broadly, the statement must be recognisable as opinion, indicate the basis of the opinion, and be one that an honest person could have held on the basis of existing facts or privileged material.

Publication on a Matter of Public Interest

Section 4 provides a defence where:

The statement concerned a matter of public interest.
The defendant reasonably believed publication was in the public interest.

The Act abolished the older common-law Reynolds defence and replaced it with this statutory framework.

Website Operators

Section 5 created a defence for website operators in relation to material posted by users where the operator was not the person who posted the statement.

The defence can be defeated in certain circumstances, including where the claimant cannot identify the poster and the operator fails to respond in accordance with the statutory framework.

This was an important reform for user-generated websites, forums, and other online platforms.

The Single Publication Rule

Historically, every new access to defamatory material could create complications for limitation periods.

Section 8 introduced a single-publication rule for substantially the same material published by the same person.

This helps prevent indefinitely renewed limitation periods merely because archived online content continues to be accessed.

Jurisdiction and Libel Tourism

Section 9 restricts defamation claims against defendants who are not domiciled in the UK, another EU member state, or certain related states unless the court is satisfied that England and Wales is clearly the most appropriate place to bring the action.

The reform was aimed partly at concerns about “libel tourism.”

Has the Defamation Act Reduced Claims?

The serious-harm requirement makes it harder to bring trivial claims, and the statutory defences provide clearer protection for responsible expression.

But the Act did not make reputation claims easy for defendants to dismiss. Serious online publication can still create substantial liability where statements are false, damaging, and unsupported by a defence.

Negligence and Defamation Compared

Negligence	Defamation
Protects against careless harm	Protects reputation
Requires duty, breach, causation and damage	Requires defamatory publication meeting the serious-harm threshold
Reasonable-care standard	Truth, honest opinion and public-interest defences may apply
Often involves physical, property or recognised economic loss	Focuses on reputational harm

Frequently Asked Questions

Does every foreseeable risk create a duty of care?

No. Foreseeability is important, but duty questions depend on established negligence principles and, in genuinely novel situations, wider considerations including proximity and whether a new duty should be recognised.

Is the Caparo test used in every negligence case?

No. The Supreme Court in Robinson clarified that established categories should be resolved using existing precedent rather than automatically applying a universal Caparo formula.

Can a company sue for defamation?

Yes, but a body trading for profit must show serious financial loss or a likelihood of serious financial loss.

Can a website be liable for a user’s defamatory post?

Potentially, although section 5 of the Defamation Act 2013 provides a defence for operators in defined circumstances.

Conclusion

UK negligence law asks whether the defendant had a legally recognised responsibility to protect the claimant from a particular risk, whether reasonable care was taken, and whether the breach caused recoverable damage. Modern Supreme Court decisions stress that duty questions should be grounded in established legal principles rather than treated as a free-floating fairness test.

Defamation law addresses a different balance: reputation versus freedom of expression. The Defamation Act 2013 raised the threshold through the serious-harm requirement, clarified statutory defences, introduced protections for website operators, and limited repeated claims based on archived publication.

Both areas illustrate the same broader principle of private law: liability depends not simply on whether someone suffered harm, but on the precise legal responsibility the defendant owed and the limits placed on that responsibility.