By Laura Walters

Former prime minister Helen Clark will join one of world's leading drug policy reform think tanks, along with other former world leaders.

Clark, who last year lost her bid to become the next Secretary-General of the United Nations, ended her second four-year term with the United Nations Development Programme (UNDP) in April.

And on Thursday (New Zealand time) she was announced as one of the new members of the Global Fund, which aims to reform drug policy in order to reduce societal harm. Helen Clark will be working alongside former United Nations secretary general Kofi Annan, and prominent business people and cultural leaders such as Sir Richard Branson.

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Thumbnail: CC UNDP