"It must be proved that the assault (which includes 'battery') 'occasioned' or caused the bodily harm. Where the harm is not the direct result of the defendant's act, as, for example, where his conduct was such as to provoke the victim to jump from a moving car, the test is whether the victim's act was the natural result of the defendant's action or words, in the sense that it was something that could reasonably have been foreseen as the consequence of what he was saying or doing."
"The test is: Was it the natural result of what the alleged assailant said and did, in the sense that it was something that could reasonably have been foreseen as the consequence of what he was saying or doing."
"The defendant, a schoolboy aged 15, was attending a chemistry class at his school. Pupils were provided at the outset with an instruction sheet emphasising the need of great care with carrying out experiments and were orally warned of the dangers of working with acid. The lesson included observations of the effects of putting concentrated sulphuric acid into chlorine, water and ammonia. During the lesson the defendant obtained permission to visit the lavatory to wash some acid off his hand and, unknown to the master in charge, took with him a boiling tube of concentrated acid. He went into a cubicle to test the reaction of the acid with toilet paper and, upon hearing footsteps outside, panicked and poured the rest of the acid into the upturned nozzle of an air hand-face drying machine. When the footsteps receded, he returned to his class discarding the empty tube on the way. He intended to return and deal with the acid in the dryer later. In the meanwhile another pupil went to the lavatory to wash his hands and turned on the dryer with the result that the acid was ejected onto his face, leaving a permanent scar. The defendant was charged with assault causing actual bodily harm contrary tosection 47 of the Offences Against the Persons Act 1861 . The justices dismissed the charge finding that the defendant panicked on hearing the footsteps approaching the lavatory but his motive was only to conceal the acid and his omission to warn others did not constitute an assault for the purposes of section 47."
"If a man laid a trap for another into which he fell after an interval the man who laid it would during the interval be guilty of an attempt to assault and of an actual assault as soon as the man fell in."
"In the same way a Defendant, who pours a dangerous substance into a machine, just as truly assaults the next user of the machine as if he had himself switched the machine on. So, too, in my judgment would he be guilty of an assault if he was guilty of relevant recklessness."
"... I see no rational ground for excluding from conduct capable of giving rise to criminal liability, conduct which consists of failing to take measures that lie within one's power to counteract a danger that one has oneself created, if at the time of such conduct one's state of mind is such as constitutes a necessary ingredient of the offence. I venture to think that the habit of lawyers to talk of actus reus, suggestive as it is of action rather than inaction, is responsible for any erroneous notion that failures to act cannot give rise to criminal liability in English Law."