Brief Background
The Law Reform (Contributory Negligence) Act 1945 is a piece of legislation that enables the courts to designate liability in a just and equitable manner for damages between an injured party and a defendant liable in tort in England, Wales and Scotland. This was an important piece of legislation in the context of governing the laws for negligence to allow injured parties, who may have been partly at fault for their injury, to still be able to claim for damages.
Why was it introduced?
Up until the Act was passed, the defence of contributory negligence in tort law was considered to be a full defence to negligence claims that may have been raised. This had the opportunity to lead to a number of circumstances where a dominant party would avoid having to pay compensation on the basis that the claimant had been marginally at fault for the injury that was caused. This was particularly applicable to employers and employees with regards to workplace injuries where the employer could escape having to pay high costs in damages. However, contributory negligence also occurred in circumstances outside of the workplace where inequitable decisions had occurred and therefore it was felt that the law needed to be addressed.
Law Teacher writing support
Writing a law essay?
We choose a writer who is an expert in your area of law and qualified to at least the academic level you select. Most of our writers hold a master’s degree or PhD, have teaching experience, or both.
Send us your question and, if you wish, any marking criteria. We’ll write an essay to your instructions.
The Law Reform (Contributory Negligence) Act 1945 received Royal Assent on 15 June 1945, before the end of the Second World War. Further reforms to employers’ liability followed, including the Law Reform (Personal Injuries) Act 1948.
What was the aim of the Act?
At the time of the introduction of the Law Reform (Contributory Negligence) Act 1945, there were defences that assisted employers in guarding against claims in negligence for workplace injuries. Contributory negligence was a prominent and full defence that could be used by employers to prevent claims of negligence in the workplace. This meant that employers could avoid paying compensation if it could be proved that the worker was at least partly to blame for the accident that caused the injury, even if the employee’s blame was severely less than the employer’s. Aside from this, employers could also argue for ‘volenti non fit injuria’ which essentially restricted liability against negligence claims on the basis that the employee had freely accepted the risk of injury and agreed to absolve the employer from liability for it. Mere knowledge of a danger, or continuing to work despite it, was not by itself sufficient to establish that consent.
Therefore, the aim of the Law Reform (Contributory Negligence) Act 1945 was intended to provide greater protection to parties that had a claim in damages for negligence but were prohibited from succeeding on the basis that they had been partly to blame for the damage that had been caused. This protection would be helpful to limit circumstances that had created clearly unjust decisions as seen in the common law before the introduction of the Act.
What main changes did it make to the law?
In legal terms, the Law Reform (Contributory Negligence) Act 1945 changed the law regarding the defence of contributory negligence and rather than allowing it to be employed as a full defence, ensured that it would be fairly considered by courts to reasonably apportion blame and damages to the relevant parties in a negligence dispute. Further to this, the Act also defines the appropriate method for the courts to consider the damages that are owed to the claimant in such situations.
Key Sections
The Law Reform (Contributory Negligence) Act 1945 section 1 (1) states that where a person suffers damage partly through his own fault and partly through the fault of another person or persons, a claim shall not be defeated on the basis that the claimant was partly at fault. Instead, damages are reduced to the extent that is just and equitable, having regard to the claimant’s share of responsibility for the damage. This is a fundamental section of the Act. Section 1 (2) requires the court to find and record the total damages that would have been recoverable if the claimant had not been at fault, before applying the reduction. Section 1(1) preserves contractual defences and applicable contractual or statutory limits on liability.
It is worth noting at this stage that the Law Reform (Contributory Negligence) Act 1945, section 2 was repealed soon after its introduction by the National Insurance (Industrial Injuries) Act 1946 and is no longer in effect.
The Law Reform (Contributory Negligence) Act 1945, section 4 defines certain important terms that are listed under the Act such as ‘court’, ‘damage’ and ‘fault’. The definition of “fault” includes negligence, breach of statutory duty and other acts or omissions giving rise to liability in tort or, apart from the Act, the defence of contributory negligence. It is worth noting that section 5 deals with the application of the Act in Scotland, under broadly the same terms as that in the earlier sections of the Act. The Act does not apply to Northern Ireland as per Law Reform (Contributory Negligence) Act 1945, section 6. Northern Ireland has its own apportionment provision in section 2 of the Law Reform (Miscellaneous Provisions) Act (Northern Ireland) 1948.
2026 update
The Law Reform (Contributory Negligence) Act 1945 remains the primary statutory basis for contributory negligence in English law and continues to apply widely in negligence and personal injury litigation. Section 1 requires courts to reduce damages to the extent that is “just and equitable”, reflecting the claimant’s share of responsibility for the damage.
Modern case law has clarified how this apportionment works in practice. Courts distinguish between the cause of the accident and the cause of the damage, meaning a claimant may be contributorily negligent even if their conduct did not cause the accident itself but increased the severity of the injury. For example, in Froom v Butcher [1976] QB 286 the Court of Appeal reduced damages because the claimant failed to wear a seatbelt, which worsened the injuries sustained. Failure to wear a seatbelt does not justify reducing damages for an injury that the seatbelt would not have prevented or lessened.
The concept is now routinely applied across a wide range of tort claims, particularly road traffic accidents and workplace injuries, and the courts determine the percentage reduction based on both causative contribution and blameworthiness, as confirmed by the Supreme Court in Jackson v Murray [2015] UKSC 5, a Scottish appeal. A child’s age and the circumstances in which a claimant acted are relevant; the assessment is not simply an arithmetic comparison of blame. As a result, the Act remains a central component of modern negligence law, but its practical application is largely shaped by judicial decisions interpreting section 1.
The defendant bears the burden of proving contributory negligence. The claimant must have failed to take reasonable care for their own safety or interests, and that failure must have contributed to the damage. In workplace cases, the court takes account of the working conditions and the employee’s reasonable reliance on others complying with safety duties; every momentary error does not necessarily justify a reduction.
The Act is not a general power to reduce damages in every civil claim. In contract, it can apply where the contractual duty of care is concurrent with a duty in tort, but not merely because the claimant was careless in a claim for breach of a strict contractual obligation: Forsikringsaktieselskapet Vesta v Butcher [1989] 1 AC 852. The claimant must still establish the defendant’s liability; the Act does not create liability where none otherwise exists.
Last updated: 11 November 2026
