Factual and Procedural Background
This opinion concerns five appeals against conviction and one Attorney General's reference, all raising the issue of whether a defence of medical necessity is available for offences under legislation controlling cannabis cultivation, production, importation, and possession. The appellants include individuals who cultivated or possessed cannabis for personal medicinal use due to chronic pain or other medical conditions, and others involved in importing cannabis for distribution to patients through a clinic. The Attorney General's reference involves a defendant charged with possession with intent to supply cannabis for medicinal purposes.
Each appellant's case involves claims that their use or supply of cannabis was necessary to alleviate serious pain or injury and that their conduct should be excused on that basis. The courts below have taken differing approaches, with some judges refusing to leave the defence of necessity to juries and others allowing it, resulting in convictions and acquittals. The appeals and reference challenge these rulings, focusing on the availability and scope of the defence of medical necessity in the context of controlled drug offences.
Legal Issues Presented
- Whether the defence of medical necessity is available to defendants charged with offences involving cannabis cultivation, possession, or supply under the Misuse of Drugs Act 1971.
- If available, the extent and conditions under which such a defence may be raised, including whether it covers avoidance of serious pain as well as serious injury.
- Whether the defence applies when the defendant acts for the benefit of others (e.g., patients) rather than solely for personal use.
- The compatibility of the current legislative scheme and the availability of the defence with the European Convention on Human Rights, particularly Article 8.
- The interpretation of the statutory scheme regulating controlled drugs and its impact on the common law defence of necessity.
Arguments of the Parties
Appellants' Arguments
- Each appellant contends that their cultivation, possession, or supply of cannabis was necessary to avoid serious pain or injury, and thus excusable under the defence of medical necessity.
- They argue that pain should be equated with serious injury or that pain can lead to psychological injury amounting to serious injury.
- Some appellants contend that the defence should apply not only to personal use but also to those who act responsibly on behalf of others suffering serious medical conditions.
- They submit that trial judges erred in refusing to leave the defence of necessity to juries and that juries should be permitted to weigh the evidence and determine guilt or innocence.
- They argue that, absent recognition of the defence, the legislative scheme may be incompatible with the European Convention on Human Rights, particularly the right to respect for private life under Article 8.
- They rely on various authorities from medical law and human rights jurisprudence to support their position.
Crown and Attorney General's Arguments
- The Crown submits that the defence of necessity requires the causative feature of the offence to be extraneous to the defendant and that the appellants' cases lack this element.
- It is argued that the defence does not extend to avoidance of serious pain and that the legislative scheme expressly regulates medicinal use of drugs, excluding cannabis except under strict conditions and licences.
- The Crown contends that allowing the defence would undermine the legislative scheme by permitting unqualified individuals to self-prescribe or supply cannabis, risking the integrity of drug control laws.
- Policy considerations support a narrow interpretation of the defence to prevent it becoming a licence to offend based on subjective vulnerability or personal characteristics.
- The Attorney General submits that the defence of necessity is not available for possession with intent to supply cannabis, even for medicinal purposes.
- They assert that the legislative scheme is consistent with the European Convention on Human Rights and that courts should respect Parliament's role in regulating controlled substances.
Table of Precedents Cited
| Precedent |
Rule or Principle Cited For |
Application by the Court |
| Martin [1988] 88 Cr App R 343 |
Defence of necessity available where defendant reasonably fears death or serious injury from extraneous circumstances; issues to be left to the jury. |
Affirmed the availability of necessity in extreme circumstances but subject to strict criteria; cited as foundational for necessity defence. |
| Pommell [1995] 2 Cr App R 607 |
Necessity and duress by circumstances are generally available defences except for murder and certain treason offences. |
Supported the principle that necessity applies broadly but within limits; emphasised case-by-case development. |
| Hasan [2005] UKHL 22 |
Clarified duress defence, requiring objective assessment of threat and extraneous cause; defence to be narrowly construed. |
Used to underline the need for extraneous circumstances and objective evidence for duress and necessity defences. |
| Rodger & Rose [1998] 1 Cr App R 143 |
Rejected necessity defence based solely on suicidal tendencies of the defendant; emphasised extraneous cause requirement. |
Held that subjective mental states without extraneous cause do not justify necessity; distinguished from other cases. |
| Shayler [2001] EWCA Crim 1977; [2003] 1 AC 247 |
Discussed difficulty in defining precise limits of duress and necessity; emphasised need for external threat and objective assessment. |
Confirmed that necessity requires external cause and cannot be based on subjective motivation alone; influenced court's reasoning. |
| Brown [2003] EWCA Crim 2637 |
Confirmed that evidence must be sufficient to raise a defence of necessity to be left to the jury; subjective pain insufficient without extraneous cause. |
Supported refusal to leave necessity defence to jury where evidence lacked objective basis; applied to medical necessity claims. |
| Gillick v. West Norfolk and Wisbech Area HA [1986] 1 AC 112 |
Medical necessity in treatment of minors without parental consent; established principle of acting in best interests under necessity. |
Distinguished as involving medical treatment decisions, not applicable generally to necessity defence in drug offences. |
| In re A (Conjoined Twins) [2001] Fam 147 |
Necessity defence applied to medical decisions involving competing lives; distinguished from criminal necessity cases. |
Used to illustrate limits of necessity in medical context; court rejected broad application to drug offences. |
| Southwark L.B.C. v. Williams [1971] Ch 734 |
Rejected necessity defence for squatters; emphasised that continuous unlawful self-help is unlikely to be excused. |
Supported view that necessity defence is limited to emergencies, not prolonged or deliberate breaches of law. |
| Philip David Lockwood [2002] EWCA Crim 60 |
Discussed jury directions on necessity defence in cannabis cultivation; emphasised clarity but did not decide availability of defence. |
Considered persuasive but insufficient to establish necessity defence; court declined to extend defence on that basis. |
| Venables and Thompson v. News Group Newspapers Ltd [2001] Fam 430 |
Extension of common law to protect privacy rights under ECHR; balancing competing interests. |
Distinguished as a civil case involving privacy, not criminal defence; court noted limits on extending common law. |
Court's Reasoning and Analysis
The court began by examining the factual and legal contexts of the appeals and reference, focusing on the availability of a common law defence of necessity in relation to offences under the Misuse of Drugs Act 1971 involving cannabis. It acknowledged the appellants' and the Attorney General's reference cases where defendants claimed medical necessity to justify cultivation, possession, or supply of cannabis.
The court analysed the common law principles of duress and necessity, emphasizing the requirement of extraneous circumstances causing a justifiable fear of death or serious injury. It reaffirmed that the defence must be strictly limited, with an objective test requiring evidence of an external threat or danger, not merely subjective feelings or internal motivations such as pain or suicidal thoughts.
The court considered relevant authorities including Martin, Rodger & Rose, Shayler, and Brown, concluding that the defence of necessity does not extend to cases where the causative feature is the defendant's own mental or physical condition absent extraneous cause. It rejected the appellants' argument that severe pain equates to serious injury sufficient to found the defence, noting the significant subjective element in assessing pain and the need for imminence and immediacy of threat.
The court further examined the statutory scheme regulating controlled drugs, highlighting the detailed legislative framework that restricts medicinal use of cannabis to licensed medical research and excludes self-prescription or unregulated supply. It held that allowing a necessity defence to circumvent this scheme would undermine Parliament's clear policy and create enforcement difficulties.
In relation to the European Convention on Human Rights, the court found no basis to extend the common law defence to avoid incompatibility with Article 8. It noted the government's discretion and Parliament's role in regulating drugs and concluded that the legislative scheme is consistent with the Convention.
Overall, the court determined that none of the appellants or the defendant in the Attorney General's reference had evidence sufficient to raise a defence of necessity. The judges' rulings refusing to leave the defence to juries were correct or, where the defence was left, the verdicts were not disturbed.
Holding and Implications
The court's final decision is to DISMISS ALL APPEALS AND ANSWER THE ATTORNEY GENERAL'S REFERENCE IN THE NEGATIVE.
The court held that the common law defence of necessity is not available to defendants charged with offences involving cannabis cultivation, possession, or supply on grounds of medical necessity where the conduct contravenes the statutory scheme regulating controlled drugs. The defence requires extraneous circumstances causing imminent threat of death or serious injury, which the appellants' cases did not establish.
This decision upholds the legislative framework restricting medicinal use of cannabis to licensed medical contexts and rejects attempts to circumvent this through common law defences. It confirms the courts' role in applying existing law rather than creating exceptions based on individual hardship or policy considerations, which remain matters for Parliament and the executive.
No new precedent expanding the defence of necessity was established; the ruling reinforces the narrow and objective criteria for such defences and the primacy of statutory regulation in controlled drug offences.