A mother whose son was killed by a drug driver is urging against the legalisation of cannabis

The Government is drafting a bill around the regulations that would be used if we legalise cannabis.

That will then be put to a referendum to run alongside next year's general election.

Barbara Semb's son Chris was killed when a van crossed the centre line and hit his motorbike in Australia 5 years ago, the driver was high on a mixture of cannabis and prescription drugs.

The Auckland woman says she would have voted no to legalisation before her son died but feels even more strongly now.

She doesn't want any mother to go through what she did.