There has been a fair amount of confusion surrounding the legality of CBD oil. But while the vast majority of cannabinoids are controlled substances under the Misuse of Drugs Act, rest assured that CBD oil is legal across the UK for medicinal purposes, provided it has been derived from an industrial hemp strain that is EU-approved. These strains contain very little to no THC (the psychoactive cannabinoid).
Still, CBD is already commonly used to relieve some symptoms of anxiety, including insomnia, and there have been some studies that show it to be effective in those cases. Other studies have shown that CBD could have anti-inflammatory properties, and many CBD products are marketed for relieving chronic pain, such as arthritis. And multiple studies have found CBD to be an effective treatment for seizures, and there are various CBD products that are used by patients with epilepsy. However, major health agencies like the U.S. Food and Drug Administration, National Institutes of Health and the World Health Organization have all stated in recent years that additional CBD testing and research is necessary.