The Conservatives have criticised home secretary Jacqui Smith’s plans to remove benefits for drug addicts failing to comply with their treatment programme, saying they do not go far enough.

Shadow home secretary David Davis said: "We need a zero-tolerance approach to drugs, right the way from our shores to our streets. That starts with a dedicated border police force, and includes re-classifying cannabis, abstinence-based rehabilitation and proper drug treatment in our prisons."