Medical cannabis has been legal in the UK since 2018, provided it is prescribed...

https://starbucks-menus.com/the-wellness-trend-uk-women-are-turning-to-for-medical-cannabis/

Medical cannabis has been legal in the UK since 2018, provided it is prescribed by a specialist doctor for specific clinical conditions. It isn’t a one-off purchase; it is accessed through regulated clinics that follow a structured pathway