A primary judge's characterisation of the foreseeable risk of injury may be vitiated by hindsight reasoning where the judge focuses on the actual injury suffered and the actual mechanism of injury rather than assessing foreseeability prospectively. However, where some personal injury is foreseeable (even if the probability is low and the likely severity is minor), an employer breaches its duty of care by failing to take available alleviating measures that involve no expense, difficulty or inconvenience. The case also confirms that it is not necessary to foresee the particular injury, its severity, or the precise mechanism — it suffices that some personal injury to a member of the relevant class is foreseeable.
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