Since 2018, medical cannabis has been legal in the UK when prescribed by a...

https://iris-wiki.win/index.php/Medical_Cannabis_and_PTSD_in_the_UK:_What_Do_Clinics_Actually_Consider%3F

Since 2018, medical cannabis has been legal in the UK when prescribed by a specialist doctor. For those who haven’t seen progress with conventional treatments, the process is managed through regulated clinics