Medical cannabis experts and advocates, Hannah Deacon and Professor Mike Barnes, sit down with their guests to find out why cannabis matters to them. ---Peter Reynolds is a writer, consultant and lifelong cannabis campaigner. An expert in the science, medicine, law and politics of cannabis, he has been fighting for legalisation for more than 30 years since his first experience of the plant as a teenager. However, it was meeting patients, for whom cannabis was a life-saving medicin...