I would seriously consider firing whoever came up with this shit:
https://twitter.com/CCHQPress/status/591607938567032834
I think that having the SNP involved in government in any form would be a nightmare, but I also think that the SNP's position is a lot weaker than the Tories are trying to portray. What are the SNP going to do if Ed tells them that, no, you're not going to have any input into our policies, so back me or sack me? Are they really going to bring down a Labour government, or vote against left leaning Labour policies? As long as the SNP aren't actively voting against a Labour government, Ed should be able to secure a majority in the commons.