Until 1981, the leading authority on recklessness was R v Cunningham [1957]. The defendant was charged under section 23 of the offences Against the Persons Act 1861

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Lord Diplock stated in 1981, in Metropolitan Police Commissioner v Caldwell [1982] AC 341, that a person is reckless if “a) he does an act which in fact creates an obvious risk that property would be destroyed or damaged and b) when he does that act he either has not given any thought to the possibility of there being any such risk or has recognized that there was some risk involved but has nonetheless gone on to do it.” Lord Diplock’s decision in this case was to change, for two decades, how the courts ruled on instances of recklessness. The statement was in essence an attempt to clarify what has been a confusing area in criminal law but as will be shown actually had the inverse effect. This essay will look at the law prior to this statement and discuss the ramifications this judgement was to have on cases involving recklessness.

Simply speaking recklessness is the taking of an unjustified risk. Not all cases of risk taking constitute recklessness. It depends on the level of risk involved and the seriousness of the potential harm. It is also crucial to take into account the social utility of the action. Some risks may be legally taken, for example, “the surgeon performing an operation…would not properly be described as reckless unless the risk he took was an unreasonable one”. The risk undertaken is balanced by the social utility of the activity. Consequently, “if an act has no social utility but involves the slight possibility of the risk of harm, this would suffice to render the taking of that risk a reckless act”.

    Until 1981, the leading authority on recklessness was R v Cunningham [1957]. The defendant was charged under section 23 of the offences Against the Persons Act 1861 with ‘maliciously administering an obnoxious thing so as to endanger life’. It was held that the statutory definition of ‘malicious’ was intentionally or recklessly and the court defined recklessness as “the accused has foreseen that the particular kind of harm might be done and yet has gone on to take the risk of it”.  This is a subjective form of Mens Rea requiring the defendants “actual awareness of the risk of the prohibited consequence occurring”. 

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So to establish criminal liability under the Cunningham test the prosecution must prove that the accused not only undertook an unjustifiable risk but also was aware, at the time of undertaking, that it was an unreasonable one. With this in mind, then failing to think about a risk would not be grounds for criminal liability. An illustration of this can be seen in the decision of Stephenson [1979] QB 695, where the defendant lit a fire to warm himself in a haystack in which he was sleeping. He was charged with reckless arson but due to his schizophrenic nature and condition, ...

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