Since 2018, medical cannabis has been legal in the UK. It is not a first-line...

https://theboringmagazine.com/the-unglamorous-truth-about-getting-a-uk-cannabis-prescription/

Since 2018, medical cannabis has been legal in the UK. It is not a first-line option, so you must provide documentation showing that at least two prior treatments have failed. Eligibility requires a formal assessment by a specialist doctor