Several leading British politicians and think tanks have voiced support for medical marijuana in the United Kingdom. The government is reviewing cannabis laws following the case of a young boy with severe epilepsy, who fell ill after having his cannabis oil confiscated. Some supporters are calling for the legalization of all cannabis to bring in extra tax revenue and reduce spending on drug-related law enforcement. CGTN's Paul Barber has this report from London.

Love Hemp has been selling cannabis-based supplements legally in the UK since 2015. The company's oils, sprays, lotions - and even water - are available in mainstream grocery and health stores. They contain one of the main active ingredients of cannabis - CBD - which the company says reduces anxiety. Professional bodybuilder James Hollingshead has been a customer since May.

JAMES HOLLINGSHEAD IFBB PROFESSIONAL BODYBUILDER "The biggest thing for me is the psychological aspects of not feeling overwhelmed, feeling somewhat restful and somewhat relaxed despite what's about to happen and what I'm preparing."

PAUL BARBER LONDON "Love Hemp has seen a sharp increase in sales of its products including oils like this which is 40 percent CBD. In the last 12 months, they've seen sales of nearly four million dollars."

TONY CALAMITA, CO-FOUNDER & MANAGING DIRECTOR LOVE HEMP & CBD OILS UK "We still have some way to go, but the acceptance of cannabis as a normal product and all the negative connotations that come along with it is moving in the right direction and public perception is slowly getting very positive."

THC, the cannabis ingredient associated with euphoria - but also linked to psychosis - is illegal in Britain. But a new government review into medicinal marijuana could change that.

It follows the separate cases of two young boys with rare forms of epilepsy who were granted short-term emergency access to cannabis oil containing THC from overseas.

Tony Calamita welcomes the potential easing of rules.

TONY CALAMITA, CO-FOUNDER & MANAGING DIRECTOR LOVE HEMP & CBD OILS UK "We do believe that some THC in controlled amounts with the supporting studies can have even great health benefits. So we would really at some point in the future be able to incorporate a controlled amount of into certain products."

A leading conservative campaign group the Taxpayers' Alliance has joined other think tanks and politicians in calling for full legalization of medicinal AND recreational uses of cannabis - for fiscal reasons.

HARRY FONE, GRASSROOTS CAMPAIGN MANAGER TAXPAYERS' ALLIANCE "The country could save around 890 million pounds per year, that's roughly around 1.2, 1.3 billion dollars. This is in terms of costs in policing that would be saved, health care especially with things like using cannabis for pain relief."

Many experts welcome the relaxation of medicinal cannabis laws - but warn full legalization along the lines of the U.S. state of Colorado, could have negative health implications.

SIR ROBIN MURRAY, PROFESSOR OF PSYCHIATRIC RESEARCH KING'S COLLEGE LONDON "They have legalized cannabis as in the Wild West, which is where they are. Anything goes, and what has happened is the potency has increased. In Colorado, you can get 60, 80, 99 percent THC. So this is a bit like comparing a shandy or lager with the strongest vodka or whisky."

Canada recently became the second country in the world after Uruguay to legalize cannabis. With UK public attitudes shifting, it may not be long before British law catches up. PB, CGTN, London.