According to the UK Green Party website the Green Party will try to achieve the following if they gain power at the 2010 general election:

DU405 Cannabis would be removed from the 1971 Misuse of drugs act. The possession, trade and cultivation of cannabis would be immediately decriminalised, roughly following the Dutch model. The trade in Cannabis would be the subject of a Royal Commission (see below), with a view to establishing a fully legalised, controlled and regulated trade. Small-scale possession of drugs for personal use would be decriminalised. The starting point would be advice to policing authorities to caution rather than prosecute for offences of drug possession for personal use and to refer offenders to the health-care services (see DU411). Subsequently, regulations would be brought forward removing criminal sanctions for simple possession of controlled drugs for personal use. The recommended sentences for small-scale supply would be non-custodial options. The possession of pipes made for the use in connection with smoking of opium would no longer be a criminal offence. A Royal Commission or similar body would be established to review currently controlled drug classifications, within a legalised environment of drug use. This commission would, after wide consultation, consider and recommend frameworks of social, economic and health conditions for drug use and supply.

I would be interested to hear both positive and negative views on UK Green Party’s Cannabis policies in the comments below?