New Zealand has a limited range of ventures producing medicinal cannabis - but the most successful distributor doesn't even sell directly to Kiwis.

Medical marijuana company Puro has just signed a $16 million distribution deal in the UK, but co-founder Tim Aldridge says red tape is stopping the business from selling domestically.

Aldridge says there's no manufacturing or packaging companies that can take their product - and they need to ship that out to Australia.

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