After the nationalists' pledge to oppose the Tories, Miliband could simply invite them to support a left-wing Queen's Speech.
Party promises to force companies to pay workers at least the minimum wage after they have served four weeks.
The Labour leader filled the prime ministerial void on the stage and threw down the gauntlet to Cameron.
The party manifestos fight hard to cover up perceived weaknesses. Labour don't want to admit they'll borrow to invest; the Tories don't want to explain the welfare cuts.
Shadow chancellor deploys new line of attack against the Conservatives' profligate manifesto.
On matters political as well as fiscal, it is Labour that is better able to make the sums add up.
There is nothing "progressive" about "spending more on your debt interest repayments ever year than you do on housing," says the shadow business secretary.
Shadow business secretary Chuka Umunna faces a battle on two fronts as he attempts to secure Britain's place in a global economy - without alienating business leaders.
Labour leader vows to end system under which wealthy individuals avoid paying tax on their overseas earnings.
The former PM, who once said he didn't mind how much David Beckham earned, says he agrees "completely" with the Labour leader on the subject.