Despite this, the single most popular general election outcome in these seats was a coalition involving Labour and the SNP — a result favoured by 39 % of voters overall, including 62 % of SNP supporters and 79 % of Labour - SNP switchers.
Just over two thirds (68 %) of switchers from Labour to the SNP say they definitely rule out voting Labour again in 2015 — which means nearly one third are at least open to the idea of returning.