The plant cannabis is a schedule 1 drug in all forms (leaf, bud, resin etc.) and not available for regular medicinal use. A medicinal extract, Sativex, is licensed for use in clinical trials and an unlicensed drug for named patients.
The synthetic cannabinoid, Nabilone, is licensed as a Schedule 4 drug under laws of the country for use in chemotherapy induced nausea and vomiting besides being widely used for treating pain and spasticity. Growing any cannabis (for medicinal or recreational purposes) is illegal, with no exceptions, unless authorized by a government license.