You know to tell you the truth Scots will be kind of demonised by sections of the London media, and the Conservative Party in England, whatever we do. If we did swing back to Labour and it tipped the scales in an election then Scots would be blamed for forcing Labour on to a Tory voting England. We've been kind of accused of that already even though the Blair/Brown gvts all had a majority of seats in England anyway. If we stick to voting for who we actually want to then at the moment Labour are going to get cuffed in Scotland. Unlikely to make much difference to the overall Tory number of seats. Then Scotland will be castigated, as it already is being, for daring to send MPs from a party that has no mandate in England - depsite the fact that Northern Irish voters have been doing that for 90 years or so! The continual drip drip demonising of Sturgeon, Salmond and the SNP (and by association nearly half of voting Scots) by English Tories may be meant to scare floating English voters away from Ed Miliband but in tandem with that it is consolidating Nat support in Scotland and dismaying some No voters who thought we were better together and know that Scottish constituencies are just as British as constituencies in Surrey hence have as much right to their say at Westminster than anyone else. Here is one recent blog from Alex Massie - hardly a friend to the SNP.

   http://blogs.spectator.co.uk/coffeehouse/2015/03/the-tory-partys-attitude-towards-scotlandisasstupidasitiscynical/