Today's update of the Poll of Polls is based on one full-scale Scottish poll from Survation, plus nine Scottish subsamples from GB-wide polls - four from YouGov, two from Populus, one from ComRes, one from Ashcroft and one from Opinium. I haven't previously been able to incorporate polls from Opinium, because they've only just started publishing geographical subsample figures. However, that long-overdue step has coincided with them introducing a barking mad methodological change which has led to the SNP being severely downweighted. It's particularly irritating that this has happened not long after Populus finally put their house in order to some extent.
I may go into more detail about Opinium's folly when I have the time, if only because I've got an alliterative title in mind for a blogpost, and it'll probably nag away at me until I get it out of my system.
Scottish voting intentions for the May 2015 UK general election :
SNP 43.3% (-0.5)
Labour 26.6% (+3.6)
Conservatives 16.6% (-1.2)
Liberal Democrats 5.6% (-1.4)
Greens 3.5% (+0.6)
UKIP 3.4% (-1.1)
(The Poll of Polls uses the Scottish subsamples from all GB-wide polls that have been conducted entirely within the last seven days and for which datasets have been provided, and also all full-scale Scottish polls that have been conducted at least partly within the last seven days. Full-scale polls are given ten times the weighting of subsamples.)