I couldn't put it any better than Green MP Caroline Lucas:
Ms Lucas, who became her party's first MP when she was elected to Brighton Pavilion at last May's General Election, accused Labour of suffering "a heroic amnesia" as it tried to block the Conservative and Lib Dems' policies.
Speaking from her party's spring conference in Cardiff, she said: "How can they oppose the market in the NHS when they first introduced it?
"How are they opposing tuition fees when they first introduced it? How do they oppose the selling off of the Royal Mail? That was (former business secretary) (Lord) Peter Mandelson (Labour)."
Ms Lucas added: "I've always been a bit ambitious, but I do think the Green Party is the real opposition.
"The Lib Dems are part of the Government - they can't speak out about proper constitutional reform or nuclear weapons or nuclear power or many of the things they stood for.
"Labour is utterly contaminated by the fact they pursued many of the policies which now the coalition Government is simply taking to their logical conclusions, so I think people are looking for a genuine opposition - and you won't be surprised to know I think that's the Green Party."