Since the 2018 legislative change, medical cannabis has been legal in the UK...

https://louisvpqz495.theglensecret.com/are-follow-up-appointments-required-for-medical-cannabis-prescriptions-a-guide-to-uk-standards

Since the 2018 legislative change, medical cannabis has been legal in the UK via specialist prescription. However, many remain uncertain about eligibility, the consultation process, and associated costs