Boris Johnson Preferred By Wide Margin To David Cameron, According To Observer Poll

07/10/2012 08:42 BST

Voters much prefer Boris Johnson to David Cameron, according to an opinion poll.

The survey Opinium for The Observer gave the London mayor a net +30% compared to -21% for the Prime Minister.

The wide gulf between the two old rivals is likely to intensify speculation about Mr Johnson's long-term leadership ambitions as Conservatives gather for their annual conference in Birmingham.

The poll also showed a strong pick-up in Ed Miliband's approval rating, which has risen to -10% following last week's Labour Party conference - his best showing in an Opinium poll.

Deputy Prime Minister Nick Clegg, however, continues to languish on -48%.

Overall Labour enjoyed only a small post-conference bounce, up two points on 41%, an 11 point lead over the Tories, who are up one point on 30%, with the Liberal Democrats on 9%.

Opinium surveyed 1,965 UK adults aged 18 and over online between October 2 and 4.