In today’s Daily Telegraph Andrew Porter, the newspaper’s Political Editor, commenting upon the Conservative post-conference opinion poll surge and in particular the ICM poll in The Guardian which shows support for Labour and the Conservatives as even, says,

 “In addition, a Guardian poll by ICM - which tends to favour the Tories - is thought to have the Conservatives almost neck and neck with Labour.”

As my post here shows, manifestly this is not the case. Where ICM opinion polls can be compared with election results since 2005, Conservative support is almost always underestimated in by a small amount and Labour overestimated by a larger margin. It might be the case that ICM consistently underestimates Conservative support less than the other opinion polls but this still does not add up to its polls “favouring” the Conservatives, merely that ICM is the most accurate amongst an inaccurate bunch.

Long gone are the days in the 1980’s when Gallup used to favour the Conservatives, in the sense that its opinion polls compared very well with actual election results, time after time.

Tories renew election call after poll