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Former Green party MPs aren't happy with the party's current leadership and agreement with the Government.
Some members have stepped away from the party amid concerns.
Former MP Catherine Delahunty told Tim Dower the party has little power.
Delahunty says current co-leader James Shaw is failing to live up to Green vision and principles on climate change, and not enough is being done on welfare.
“The Green’s should be a strong voice, and they would be much freer if they were not tied up with Labour, being overwhelmed with the Labour Government.”