R v Miller [1983] 2 AC 161
R v Miller establishes that a person who accidentally creates a dangerous situation may incur criminal liability by failing to take reasonable steps once aware of it. The duty arises from the defendant's own creation of the risk.
Facts
Miller, a squatter, fell asleep on a mattress while smoking a cigarette in an unoccupied house. When he awoke, he saw that the mattress was smouldering. Instead of extinguishing the fire or summoning help, he moved to another room and went back to sleep. The fire spread and caused substantial damage to the house. Miller was convicted of arson under the Criminal Damage Act 1971. He argued that he had not committed a positive act with the necessary mens rea: dropping the cigarette was accidental, while after becoming aware of the fire he merely failed to act. The House of Lords considered whether his omission could complete the offence.
Legal Issue
Can a defendant who innocently creates a danger be criminally liable for failing to take reasonable steps to avert it after becoming aware of the risk?
Held
The House of Lords dismissed Miller's appeal. A person who, without the required fault, creates a dangerous state of affairs comes under a duty to take reasonable steps to prevent or reduce the resulting harm once aware of it. Miller's initial accidental act and his later culpable failure could be treated as a continuing course of conduct. When he recognised the smouldering mattress and deliberately did nothing, he was reckless as to the risk of property damage. That omission supplied the fault needed for arson. Liability was not based on a general duty to rescue strangers; it arose because Miller himself had created the danger and then failed to respond reasonably.
⭐ Legal Principle
A defendant who creates a dangerous situation, even initially without fault, has a duty upon becoming aware of it to take reasonable steps within their capacity to prevent or minimise the harm. A culpable failure to discharge that duty can provide the actus reus when accompanied by the mens rea of the offence.
Significance
The case is one of the main recognised exceptions to the rule that omissions do not attract criminal liability. It avoids an artificial separation between an innocent act and the later emergence of fault. The principle has been applied beyond property damage, including where a defendant creates danger to another person. It should be distinguished from duties arising from statute, relationship, contract or voluntary assumption of care, illustrated by cases such as R v Stone and Dobinson. The required response remains reasonable steps, assessed according to what the defendant knew and could do.
Common exam questions about this case
Why could Miller be liable when dropping the cigarette was accidental?
The accidental cigarette created a dangerous situation. Once Miller awoke and recognised that the mattress was smouldering, he came under a duty to take reasonable steps to address the risk. His deliberate decision to move rooms and ignore it was reckless. The law treated the creation of danger and later omission as a course of conduct satisfying the offence.
Does Miller impose a general criminal duty to rescue?
No. The duty arose because Miller had created the danger himself. English criminal law does not ordinarily punish a mere failure to prevent harm without a recognised duty. Other duties may arise from statute, contract, particular relationships or an assumption of care, but Miller specifically concerns responsibility for a dangerous situation produced by the defendant's own conduct.
What must a defendant do after becoming aware of a danger they created?
The defendant must take reasonable steps that are available to prevent or reduce the harm. The law does not demand an impossible or disproportionately dangerous response. Depending on the facts, extinguishing the danger, warning those at risk or summoning assistance may be sufficient. Liability also requires the mens rea of the charged offence during the culpable failure to act.