defendent can raise the defence of duress by threats to all crimes but murder, attempted murder or treason
howe - never a defence to murder
gotts - or to attempted murder
the burden of proof is on the pros to disprove the d was under duress
valderama vega - the threat must be to kill or to do serious harm
cole - the threat must be specifically related to the crime that has been committed
2 part test in graham:
was the d compelled to act because he had reasonable belief to fear serious injury or death
would a sober person of reasonable firmness have responded in the same way
bowen - sets out the characteristics to include
age - gender - pregnancy - mental illness but NOT IQ
abdul hussain - the threat must be imminent not necessarily immediate
gill - must be no safe avenue of escape
hasan - duress not available when D voluntarily associates with criminals
if voluntarily intoxicated and mistakenly believed hes been threatened, he cannot use duress but if duress is irrelevant to the intoxication then the D can use it