Ahead of a City Council cannabis conference on Friday, Copenhagen officials say they are ready to make another push to legalise the substance.

According to prepared documents from the council, the city is proposing a three-year trial, arguing that “the legal sale of cannabis will result in decreased gang criminality, more prevention and a better life for average cannabis users”.

An intriguing element of the plan calls for the possible import of cannabis from the US states of Colorado and Washington, where voters in November legalised its recreational use.