During the last three weeks, Customs officers have seized 12 postal packages labelled as plant food granules, but which actually contained the illegal Class B drug Mephedrone

The granules, called Jolly Green Granules, are pale green and have been identified as Mephedrone, formerly a legal high, and then upgraded to a Class C drug and then to a Class B drug. Mephedrone has been linked to a number of deaths.

Customs and Immigration director of law enforcement Steven Le Marquand said that they and the Alcohol and Drugs Service were concerned that people might be purchasing them without knowing they were a class B drug, nor the serious effect the drug could have.