TTT...the big difference between Labour and the Tories in regards to the SNP is it is likely neither Party will get a clear majority. So, whoever wins will have to rely on the kindness of strangers to govern.
And while the SNP have ruled out a formal coalition with Labour, they will be prepared to work with them, issue by issue. But they have ruled out any cooperation with the Tories at all.
My reading of the situation is that Labour will still have the most number of seats, so Betty will have no choice but to ask Ed "if he can form a government" He would be a fool not reply, in that scenario, anything other than "Yes Marm"
But if its dave going to have afternoon tea at Buck House on Friday 8th of May, he will be aware that he has the same number of seats in opposition to him, north of the border then, as he does now. If he loses his only Scottish MP, then he will have one more than he does now. The incumbent in Dumfriesshire, Clydesdale and Tweeddale is defending a majority of only 4194.
The sting in the SNP's tail can work both ways !