This guide is maintained as a current resource for September 2026 and covers only the laws of England and Wales. Information is for general guidance, not legal advice. Consult a qualified solicitor for advice specific to your situation.
How can multiple people be convicted for one crime? Learn the legal doctrine of joint enterprise, the impact of recent case law changes, and the principles of shared criminal liability.
Joint enterprise is a doctrine in criminal law used in England and Wales that allows more than one person to be held legally responsible for the same criminal offence, even if only one person physically carried out the act. It is a well‑established part of the law on complicity and secondary liability, shaped largely by case law rather than statute. This article explains what joint enterprise means, how it works in practice, recent legal changes, common criticisms, and what this means for people involved in criminal proceedings.
Understanding Joint Enterprise
In criminal law, a person is typically convicted only for the act they personally commit and for which they have the necessary state of mind (known as mens rea). Joint enterprise changes this basic principle in specific circumstances. The law recognises that serious crime is sometimes committed by groups of people working together. Under joint enterprise, the courts can hold all those involved accountable, including individuals who did not deliver the physical act but who encouraged, assisted, or shared a common intent with the person who did.
Joint enterprise is particularly relevant in cases of serious violence, including murder and manslaughter, and has been used in prosecutions involving gang‑related incidents.
The Legal Principles Behind Joint Enterprise
Common Law and Secondary Liability
Joint enterprise is not a single statute or defined law; it is a set of complex legal principles developed by the courts over centuries. In English law, it is rooted in the idea of secondary liability: someone who aids, abets, counsels, or procures another person to commit a crime can be held as culpable as the principal offender.
Traditionally, joint enterprise covered several scenarios, including:
- Where two or more people actively participate in committing a crime together.
- Where a person plays a supportive role (such as acting as lookout) and intends to encourage the crime.
- Where, during the course of a shared criminal purpose, one person commits a further offence and others are held liable because they participated in the broader plan.
In this context:
- Principal offender means the person who carries out the criminal act.
- Secondary party means someone whose actions assist or encourage the offence.
How Joint Enterprise Works in Practice
The Requirement of Intent
For many years, the law allowed juries to convict a secondary party if they foresaw that the principal might commit a serious offence. This meant that knowing about the possibility of violence could be enough to secure a conviction. However, a landmark judgment by the UK Supreme Court in R v Jogee (2016) changed this legal test.
In Jogee, the Supreme Court ruled that foresight of an offence alone is not sufficient to prove guilt. Instead, there must be evidence that the secondary party intended to assist or encourage the principal to commit the criminal act. Foresight is now considered relevant as evidence of intent but is not conclusive on its own.
Practically, this means prosecutors must show:
- The defendant knew what the main offender was going to do, and
- The defendant intended to help or encourage that offence.
This legal shift narrowed the scope of joint enterprise, aligning it more closely with basic principles of criminal liability.
Example
If two people go to commit a burglary, and during that burglary one person unexpectedly stabs a victim, the second person may be liable for murder under joint enterprise if it can be shown they intended to encourage or assist the violent act. If there was no such intent, their liability might instead be limited to a lesser offence, such as manslaughter.
Joint Enterprise in Murder Cases
Joint enterprise has most commonly been applied in serious violence and homicide cases. Under the Homicide Act 1957 and common law, murder carries a mandatory life sentence, and joint enterprise can bring all participants within that framework. However, the requirement of intentional assistance or encouragement means prosecutors must carefully consider individual culpability.
A well‑known case illustrating joint enterprise principles is R v Gnango, in which the Supreme Court upheld a murder conviction under joint enterprise even though the defendant did not fire the fatal shot. This decision demonstrated how joint enterprise and related doctrines (like transferred malice) can interact in complex factual scenarios.
Criticisms and Controversies
Miscarriages of Justice and Disproportionate Use
Joint enterprise has attracted significant criticism over the years, particularly in relation to:
- Convictions where the secondary party's role was minimal or ambiguous.
- Cases where juries were directed on foresight rather than intent before Jogee.
- Claims that the doctrine has been disproportionately used against young people from Black and minority ethnic backgrounds.
A 2025 study observed that some prosecutions led to serious charges despite scant evidence of meaningful involvement, raising concerns about prosecutorial approach and fairness.
Ongoing Legal Debate
Although Jogee clarified the mental element required for conviction, experts note that issues persist in how joint enterprise is applied in practice. Critics argue that even with the corrected test, juries and practitioners may struggle to distinguish between encouragement and mere presence at a crime scene.
Practical Considerations for Those Involved in Joint Enterprise Cases
At the Charging Stage
When the police or Crown Prosecution Service (CPS) consider charging a person under joint enterprise principles, they must assess:
- The defendant's role in the incident.
- Whether there is evidence of intent to assist or encourage the criminal act.
- The strength of available evidence linking the person to the offence.
Legal advice at this stage is crucial, as charges involving serious offences like murder have severe consequences.
During Trial
In court, juries must be directed correctly on the law, particularly on the need for proof of intentional assistance or encouragement rather than mere foresight. Defence representation can challenge misuse of joint enterprise principles and argue for outcomes such as acquittal or conviction for a lesser offence where appropriate.
Appeals and Review
If a conviction is believed to rest on an incorrect application of joint enterprise law, it may be possible to seek leave to appeal. The Criminal Cases Review Commission (CCRC) can also refer cases back to the Court of Appeal where fresh evidence or legal arguments suggest a real possibility of injustice.
Key Takeaways
Joint enterprise is a common‑law doctrine in England and Wales that allows multiple people to be liable for the same criminal offence, including serious crimes like murder, even if only one person carried out the act. It has evolved significantly over time, with a key change in 2016 requiring proof that a secondary party intended to assist or encourage the offence, rather than merely foresaw it. While the doctrine aims to hold all participants accountable, it remains controversial and the subject of ongoing scrutiny and debate.
