According to Criminal Attempts Act s.1(1), if a person, with intent to commit an offence, does an act that is more than merely preparatory to the offence, they are guilty of attempting to commit that offence
MR cases like Whybrow established that for attempted murder, the defendant must have the intent to kill, as intent to cause grievous bodily harm is not sufficient
Attempting the impossible is still punishable, as seen in cases like Shivpuri, where attempting to deal drugs with a substance other than cocaine was still considered an attempt