Another poll has indicated Labour's poll lead is narrowing as the economy shows signs of revival.
It has slipped back one point over the past month to 35% - while the Tories have surged by four to 32%.
David Cameron also enjoyed a significant advantage over Mr Miliband on the economy, with 38% thinking he was most likely to keep UK plc growing compared to 24% who plumped for the Opposition leader.
However, Mr Miliband was considered more likely to keep energy prices down, by a margin of 38% to 17%.
Labour's overall lead was the lowest in a ComRes poll for 19 months. Other research recently has suggested the parties are neck and neck.
Ukip and the Liberal Democrats were both down one point on 16% and 9% respectively.
:: ComRes interviewed 2,001 adults online between Octobert 16 and 18. Data were weighted to represent all British adults and by past vote recall.
Meanwhile, Opinium for the Observer showed Labour had extended its advantage to 11 points, on 38% to 27% for the Conservatives. Ukip was on 17% and the Lib Dems 9%.
:: YouGov questioned 2,311 adults on October 17-18. Opinium surveyed 1,936 adults between October 15 and 18. Results were weighted to represent the overall population.