David Cameron has received a boost with a poll suggesting Labour had not gained ground following Ed Miliband's anointment as leader.
As activists gathered for the Tory conference in Birmingham, research by ComRes for the Independent newspaper found the party had marginally extended its advantage since the middle of last month.
The Conservatives were up two points on 39%, while Labour's rating went up one to 36%. The Liberal Democrats were unchanged on 15%.
ComRes telephoned 2,035 adults online between September 29 and October 1. The data was weighted by past vote recall.