There isn’t a fixed list of eligible conditions for medical cannabis in the UK....

https://www.foxtrot-bookmarks.win/in-the-uk-medical-cannabis-isn-t-defined-by-a-fixed-list-of-conditions

There isn’t a fixed list of eligible conditions for medical cannabis in the UK. Instead, eligibility is determined by a specialist consultant who must be satisfied that you’ve already tried at least two conventional treatments without sufficient success