LIB Dem leader Nick Clegg this morning rejected Labour’s offer of co-operation in a hung parliament.
Prime Minister Gordon Brown urged the centre party to work with Labour on electoral reform.
He told the Independent: "There are two competing visions of the future. If you want a referendum on the new politics, you have got to consider voting Labour. We are the only party committed to a referendum on it. You won’t get one with the Tories.
"There is some common ground with the Lib Dems on the constitutional issues. It is up to the Liberals to respond."
But Mr Clegg rejected the offer at his morning press conference.
He said: "I think there is something desperate, frankly, about a Labour Party and their leader Gordon Brown, who now try to present themselves as agents of reform and progress when for 13 years they have been a stubborn block to reform and progress.
"Look at their warm words on political reform. If political reform was such a great idea, why on Earth didn’t they do it for 13 years?"