Syriza, the anti-austerity party, is widely tipped to win the snap General Election on a platform of reversing government spending cuts and privatisation, it is also committed to strong action on environmental policies.
The Green Ecologists who are part of the European Green Party will take part in a joint election campaign with Syriza, which could see them join a left green coalition government.
"The decision of the Greek Greens is inspiring", said Wall. "In just three weeks Greens could be in a government that defends the Greek people from austerity and protects the Greek environment. The Green Party congratulates the Greek Greens and stands in solidarity with their party and Syriza.
"A victory for the anti-austerity forces in Greece could lead to the reversal of disastrous policies that have brought misery to a continent. The Greek Greens and Syriza should inspire all of us who want an end too to Osbornomics, which piles misery on the poorest while making the richest in Britain even better off."