UK cannabis laws changed in 2018 with an update to the Misuse of Drugs...
https://noon-wiki.win/index.php/How_Do_Repeat_Prescriptions_Work_for_Medical_Cannabis_in_the_UK%3F
UK cannabis laws changed in 2018 with an update to the Misuse of Drugs Regulations 2001, not the Misuse of Drugs Act 1971