basicintent offences are offences which have recklessness in the mens rea e.g battery.
specificintent offences are offences which only have intention in the mens rea e.g woundings18.
voluntaryintoxication is never a defence for a basicintent crime. This is because the act of being intoxicated is reckless (R v Majewski).
if D is voluntarilyintoxicated and has committed a specificintent crime, he must have the MR for the crime to be guilty (Sheenan v Moore). If he doesn't have the MR, he is not guilty (R v Gallagher).
Involuntaryintoxication is a full defence for a basicintent crime as the act of becoming intoxicated was not voluntary and therefore not intended nor reckless (R v Hardie).
If D is involuntarilyintoxicated and has the MR for a specificintent crime he is guilty of the offence (R v Kingston).