As the government eases the law on possession of cannabis, doctors and researchers have been assessing the medical properties of the drug which has been used for over 4,000 years.

For the past year, Panorama has been following the world's first commercial trials into medical cannabis.

Steve Bradshaw reports on why cannabis extract might soon be available for millions of people suffering from Multiple Sclerosis, rheumatism, arthritis, acute nerve pain, and perhaps many other conditions.

Production Team:
Reporter Steve Bradshaw
Producer David Wickham
Assistant Producer Sarah Waldron
An Independent Image production for the BBC