Actus Reus - assault, occasions, actual bodily harm
Assault - assault or battery
Occasions - assault/battery must occasion (cause) the ABH
ABH (Chan-Fook):
'actual' - injury not so trivial as to be 'wholly insignificant'
'bodily' - not limited to the harm of the skin, flesh and bones but includes organs, nervous system and brain, can include psychiatric injury not mere emotions.
'harm' - injury, ABH includes minor psychological injuries e.g. headaches and stress (Cox), cutting off ponytail (Smith) and brief unconsciousness (T v DPP)