UK cannabis law changed in 2018 through the Misuse of Drugs Regulations 2001,...

https://tiny-wiki.win/index.php/Can_I_travel_within_the_UK_with_prescribed_cannabis%3F

UK cannabis law changed in 2018 through the Misuse of Drugs Regulations 2001, allowing specialist doctors to prescribe cannabis-based medicines. Despite this, cannabis remains a Class B drug for recreational use