But during a question and answer session, Ed Miliband made clear that he had no desire to have a wholesale renationalisation of the railways.
The Labour leader told delegates: "We said we believe East Coast should remain in public hands; the Government's wrong to get rid of it as a matter of ideology.
"I just want to make this point to you though. We can only make commitments that are properly costed and so, of course the discussions have to continue on this but we will make properly costed commitments at the time of the election and that's true of this area and every area."
Earlier, following the vote, a senior party source stressed: "Renationalisation is not our policy.
"Conference is entitled to its view. We are going to do the right thing. We are not going to spend money we do not have."
While policy motions passed at the Liberal Democrat conference form the basis of the party's manifesto under its rules, any passed at the Labour conference do not commit the leadership to making them party policy.