'a person may be guilty of attempting to commit an offence to which this section applies even though the facts are such that the commission of the offence is impossible'
s.1(3) in any case where
a person's intention would not be regarded as having amounted to an intent to commit an offence; but
if the facts of the case had been as he believed them to be, his intention would be so regarded
factual impossibility
even though completion of offence was impossible, d still guilty - (shivpuri)
legal impossibility
mr was for attempting a non-existent crime, so not guilty - (taaffe)