Worried about weed: should London follow New York and decriminalise cannabis?

Almost 25 years after an experiment was ditched to caution rather than arrest those carrying small amounts of the drug, a rethink is on the cards - but the British government remains cautious

The last time London dabbled in decriminalising cannabis, it brought one part of the capital to a brief but giddy high. In 2001, an enterprising Scotland Yard borough commander empowered his officers in Lambeth to caution rather than arrest those carrying small amounts of the drug for personal use - freeing them, according to the scheme's proponents, to concentrate on more serious crimes.

The softly-softly approach was controversial in some political and policing quarters, but wildly popular in the borough - and some of its results were dramatic. Over six months, more than 2,500 hours of police officers' time were saved on processing cannabis arrests, while arrests for dealing class A drugs rose by almost a fifth.