Ed Miliband got the longest round of applause so far on the issue of the so-called bedroom tax.
He says the difference between him and David Cameron is that he will stand up for the weak instead of the strong.
He claims Cameron has sided with Rupert Murdoch, tobacco lobbyists and millionaires.
If Cameron wants to fight an election on leadership and character, "be my guest" he says.
Ed Miliband has managed to find a style that suits him, and speaking well without notes always makes a good impression.
Miliband gave shape to the kind of government he plans to lead, arguing Labour is on the side of the working majority not the elite few.
Ed Miliband will promise to reverse business rates in a key speech tomorrow, which will be financed by not reducing corporation tax.