Homicide Reforms

Law Commission Proposed Reform of Murder and Manslaughter

The Law Commission has published a consultation paper concerning a review of homicide law, proposing the most significant restructuring of murder and manslaughter in England and Wales for two decades.

The consultation forms part of a wider review commissioned by the Ministry of Justice. It is the first stage of a three-part project. This paper focuses on homicide offences, with separate consultations to follow on homicide defences and the sentencing framework for murder.

The Commission’s starting point is that the current law does not adequately reflect the wide range of culpability involved in unlawful killings. Although homicide is the most serious category of criminal offending, the law largely distinguishes only between murder and manslaughter. The Commission argues that this binary framework fails to capture important differences in blameworthiness and can produce outcomes which are difficult to justify.

Why the Law Commission Believes Reform Is Necessary

The law of murder and manslaughter has long attracted criticism from judges, academics and practitioners. Murder remains a common law offence carrying a mandatory life sentence, yet it encompasses a broad spectrum of conduct.

A defendant who deliberately plans and executes a killing is guilty of the same offence as one who intended only to cause really serious injury. Both are convicted of murder and receive a mandatory life sentence, albeit with different minimum terms.

At the same time, manslaughter covers a wide range of conduct, including unlawful act manslaughter, gross negligence manslaughter and killings where a partial defence to murder succeeds. The Commission considers that these forms of liability lack a sufficiently coherent organising principle.

The consultation therefore seeks a framework that better reflects differing levels of culpability while preserving the seriousness of unlawful killing.

The Significance of the Mandatory Life Sentence

A central theme of the consultation is the unique position of murder within English criminal law as it is the only offence that automatically attracts a mandatory life sentence. Parliament has required the Law Commission to proceed on the basis that this sentence will remain for the most serious category of homicide.

The Commission accepts that this reflects a constitutional choice by Parliament but goes on to argue that the legitimacy of a mandatory life sentence depends on limiting it to offenders whose culpability truly warrants the most severe criminal sanction.

This concern underpins the Commission’s proposals.

A New Three-Tier Structure

The most significant proposal is to replace the current two-tier system with a hierarchy of:

First-degree murder;

Second-degree murder; and

Manslaughter.

The Commission argues that this structure would improve coherence and fair labelling by distinguishing more accurately between levels of culpability. It would create an intermediate category for highly culpable killings that fall short of deliberate murder.

First-Degree Murder: Deliberate Killing

The Commission provisionally proposes that first-degree murder should be limited to cases where the defendant unlawfully kills with an intention to kill.

This would mark a significant departure from the current law, under which the same offence can be committed by intending either to kill or to cause grievous bodily harm.

Under the proposal, intention to cause serious injury would no longer be sufficient for the most serious homicide offence.

The Commission considers that deliberately taking life is morally distinct from intending serious injury, even where death results. First-degree murder would therefore be reserved for intentional killings and would continue to carry the mandatory life sentence.

The proposal reflects the principle that the mandatory life sentence should be reserved for the most culpable offenders: those who deliberately set out to end another person’s life.

The Commission also argues that this approach would bring greater clarity and align more closely with public perceptions of the gravest form of homicide.

Second-Degree Murder: A New Intermediate Offence

The Commission proposes a new offence of second-degree murder to cover other highly culpable killings.

Its principal category would include cases where the defendant intended to cause serious injury but did not intend death. Such defendants would no longer be treated as equivalent to intentional killers but would remain more culpable than most manslaughter offenders.

This addresses a longstanding criticism of the current law. A defendant may be convicted of murder without intending to kill and without appreciating that death might result. Critics argue that this creates a form of constructive liability because the mental element relates to serious injury while liability attaches to the more serious consequence of death. There is a real life tension in this approach, however, when it comes to the perception of different categories of murder in the minds of the family of a victim. 

It will also add a layer of complexity to criminal trials not currently present. The oft heard phrase form the mouth of the prosecutor is that the jury can be sure that the defendant meant to inflict “at least really serious harm.”

The consultation also explores whether particularly serious forms of reckless killing should fall within second-degree murder. The Commission seeks views on whether offenders who consciously take grave risks of causing death belong in this middle tier rather than manslaughter.

Partial Defences and the New Structure

The consultation also considers the future role of partial defences.

Currently, diminished responsibility, loss of control and participation in a suicide pact reduce what would otherwise be murder to manslaughter.

The Commission provisionally proposes that such cases should instead fall within second-degree murder.

Its rationale is that defendants whose culpability is reduced by recognised circumstances remain more culpable than most manslaughter offenders. The Commission therefore questions whether reducing liability all the way to manslaughter properly reflects the seriousness of the conduct.

Importantly, the Commission is not proposing substantive reforms to the partial defences themselves. Those issues will be examined in a later consultation. The current proposal concerns only their place within a restructured homicide framework.

Rationalising Manslaughter

The consultation also undertakes a substantial review of manslaughter.

The objective is to create a more coherent and principled structure rather than simply preserve existing categories.

Unlawful Act Manslaughter

The Commission reviews unlawful act manslaughter, under which liability can arise where a dangerous unlawful act causes death.

Concerns have been raised that the offence sometimes captures defendants who neither intended nor foresaw fatal consequences. The consultation explores whether reform is needed to ensure liability better reflects culpability.

Gross Negligence Manslaughter

The Commission also considers gross negligence manslaughter, which commonly arises in medical, workplace and professional contexts.

Long-standing concerns exist about the uncertainty surrounding concepts such as “gross” and the point at which negligent conduct becomes criminal. The consultation seeks views on whether greater clarity and consistency can be achieved.

Reckless Manslaughter

A further issue concerns reckless manslaughter as there remains debate about whether it exists as a distinct category of liability or whether such cases are effectively subsumed within gross negligence manslaughter.

The Commission therefore seeks views on whether a separate offence should exist and, if so, how it should operate within the proposed framework.

Domestic Abuse and Suicide

One of the most significant modern issues addressed by the consultation concerns deaths by suicide following domestic abuse.

The Commission recognises growing concern that existing homicide offences do not adequately address situations in which prolonged coercive, controlling or abusive behaviour contributes directly to a victim taking their own life (by way of example see the case of Ryan Wellings).

The consultation therefore examines whether criminal liability should be expanded to address such cases more effectively.

This aspect of the review reflects increasing awareness of the potentially fatal consequences of coercive control and psychological abuse, even where the perpetrator does not directly inflict the fatal injury.

Given the growing prominence of domestic abuse within criminal justice policy, this may prove to be one of the most closely watched aspects of the Commission’s work.

Infanticide

The Commission also revisits the law of infanticide.

Infanticide occupies a unique position in English criminal law because it operates both as an offence and as a defence. The consultation examines whether modern medical, psychiatric and social understandings continue to justify a separate legal doctrine.

Although no firm proposals are made at this stage, the Commission seeks views on the continuing rationale for the current law.

Joint Enterprise and Complicity

The consultation also addresses the continuing controversy surrounding complicity, often referred to as joint enterprise liability.

While the Commission does not propose a wholesale review of complicity, it considers how a tiered homicide structure might operate where multiple defendants are involved.

The Commission suggests that a more differentiated framework may better reflect varying levels of participation and culpability in group offending cases (see for example the controversy around this case in which Jaime Hamilton KC defended).

Mercy Killings and Assisted Dying

The Commission also considers mercy killings and consensual killings notwithstanding that the project’s terms of reference expressly exclude broader debates about the legalisation of assisted dying. The Commission confines itself to examining how such cases fit within existing homicide law and whether any specific reform may be required.

What’s Next?

The consultation paper does not contain final recommendations. Instead, it marks the first stage of a broader review that will continue through separate consultations on defences and sentencing before a final report is delivered.

Nevertheless, the direction of travel is clear. The Commission’s provisional view is that the current distinction between murder and manslaughter no longer provides an adequate framework for modern homicide law.

If implemented, the proposals would fundamentally alter homicide law in England and Wales. Murder would be divided into two categories, partial defences would be repositioned within the hierarchy, and manslaughter would be reorganised around clearer principles of culpability.

The reforms would represent the most substantial restructuring of homicide law since the abolition of the death penalty and would have significant implications for prosecutors, defence practitioners, judges and victims’ families.

Whether the Government ultimately chooses to implement such changes remains to be seen. The consultation provides the strongest indication in many years that comprehensive reform of homicide law may be back on the legislative agenda.

The consultation runs until 30th September 2026. You can find the consultation paper here.