Darren Johnson
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Green Party conference in Bristol: Darren Johnson

7 September 2012 Last updated at 13:19 BST

The Green Party's Darren Johnson claimed the party was "on the up" since gaining an MP and coming third in the London mayoral election.

Mr Johnson, a London Assembly member, told Chris Mason that at its conference in Bristol this weekend the party would set out plans for a "fairer and greener Britain".

Natalie Bennett was elected as the new leader on Monday and will address the conference on Friday afternoon.

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