Medical cannabis became legal in the UK in 2018, but it is not a first-stop...

https://brooksiwjk610.wpsuo.com/is-medical-cannabis-a-first-line-treatment-in-the-uk-separating-fact-from-marketing

Medical cannabis became legal in the UK in 2018, but it is not a first-stop solution. It requires a specialist prescription, typically only after other standard treatments have failed to help