Facts
The appellant was the tenant of a farmhouse and sublet rooms to lodgers, while living elsewhere and visiting occasionally. Unknown to her, the lodgers smoked cannabis on the premises. She was charged with being concerned in the management of premises used for the purpose of smoking cannabis. The magistrates held that knowledge was not required and convicted her.
History
The appellant was convicted by magistrates. The Divisional Court of the Queen's Bench Division dismissed her appeal. The House of Lords allowed her appeal and quashed the conviction.
Issue
Whether the offence under section 5 of the Dangerous Drugs Act 1965 required the prosecution to prove that the defendant knew the premises were being used for drug taking, or whether it was an offence of strict liability.
Held
Appeal allowed; conviction quashed. The offence required proof of knowledge.
Ratio
- There is a strong presumption that mens rea is required for criminal offences, especially those punishable by imprisonment, unless the statute expressly or by necessary implication excludes it. The court will interpret statutory language as requiring knowledge unless Parliament has made it clear that strict liability was intended.
The judgments
Lord Reid (lead)
He held that the presumption of mens rea applied because the offence was truly criminal and carried a possible prison sentence. The words concerned in the management implied a degree of control and awareness. Since the appellant had no knowledge of the drug use, she could not be guilty.
Lord Morris (concurring)
He agreed that the presumption of mens rea had not been displaced. The statute was aimed at those who knowingly permitted premises to be used for drug taking, not at innocent landlords.
Lord Pearce (concurring)
He concurred, emphasising that the gravity of the penalty required a mens rea element. The statutory language did not show a clear intention to impose strict liability.
Key reasoning
- The presumption of mens rea is a fundamental principle of criminal law.
- Offences carrying imprisonment are presumed to require mens rea unless Parliament clearly indicates otherwise.
- The phrase concerned in the management implies some degree of knowledge and control.
- The appellant had no control over the subtenants' activities and no knowledge of the drug use.
- The statute did not contain express words excluding mens rea, nor did necessary implication require its exclusion.
Obiter
- The distinction between truly criminal offences and quasi-criminal regulatory offences was discussed as relevant to the presumption.
Where it fits in the module
This case is central to Topic 1 on the basic principles of criminal law, specifically the requirement of mens rea and the presumption against strict liability. It contrasts with Larsonneur (strict liability for a status offence) and anticipates the later debate in G and R about subjective fault. It also relates to the discussion of regulatory offences in cases like Alphacell v Woodward (not on the list) and the development of the Gammon principles. The case illustrates the courts' reluctance to impose strict liability for offences carrying imprisonment, a theme that recurs in the module's analysis of actus reus and mens rea.
Criticisms
- The distinction between truly criminal and regulatory offences is uncertain and difficult to apply consistently.
- The presumption may be displaced too easily by courts inferring Parliamentary intention from the regulatory context.
- Later cases have struggled to define the boundary where strict liability is permissible, leading to inconsistent outcomes.
Written with AI (nvidia/nemotron-3-ultra-550b-a55b) on 1 November 2026, reviewed for errors by a second model (claude-sonnet-5.5 (Claude Code reviewer)). Read the case itself at [1970] AC 132, [1969] 2 W.L.R. 470. Spotted an error? Tell us.