R v Bailey [1983] 1 WLR 760; Crim.L.R. 353

A guy hit a man over the head with a metal bar during a hypoglaecemic attack and was convicted of wounding, after the judge said that the defence of automatism did not apply where that state was self-induced. 

The AC noted that the direction was incorrect and that self induced automatism was a defence except where the defendant had put themselves into that state recklessly (i.e. in the knowledge that it could provoke violent behaviour, etc. - e.g. drugs or alcohol). 

Despite the misdirection, the appeal was dismissed on the grounds that the defendant knew that his omission to eat after taking insulin could provoke such behaviour.