Khat: What impact will UK herb stimulant ban have?
23 January 2014 Last updated at 00:57 GMT
Home Secretary Theresa May is banning a herb called khat, a stimulant chewed by large sections of the Somali community and grown mainly in East Africa.
The UK is the biggest western importer of the plant, which in the next few months will become classified as a class C drug.
Alex Miller, editor-in-chief of Vice UK, looked into the use of the substance and the potential impact of the ban in a report on BBC Newsnight.