Scientists at Plymouth University say cannabis has no effect in halting progressive multiple sclerosis. But they say it may have some benefit for people with less serious MS.
Experts studied 500 people with MS over an eight-year period. Some were given capsules containing the active ingredient in cannabis, while others were given placebos.
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Helen has the forecast for Devon, Cornwall, Somerset and Dorset.
Helen has the forecast for Bristol, Wiltshire, Somerset, Gloucestershire and Dorset.
Figures obtained by ITV News West Country show that drivers in Plymouth spend over two working days a year stuck in gridlock in the city.