when did drug prohibition began uk
The background. Drug prohibition began in the UK during World War I, when the possession, distribution and sale of cocaine and opium was outlawed. Cannabis was added to the list in 1920, in line with international treaties.he background. Drug prohibition began in the UK during World War I, when the possession, distribution and sale of cocaine and opium was outlawed. Cannabis was added to the list in 1920, in line with international treaties.