How many times do I have to repeat that it is a trope that the SNP's hold of Scotland is what is resulting in Conservative governments. 
I even now keep the following in the Notes of my phone (I've posted it in February in response to a post about electoral reform
)
"I'm hoping that before they go we get electoral reform at Westminster first. To avoid a permanent Tory majority here in England."
While I agree with the sentiment that the SNP would be helpful in pushing through electoral reform in Westminster (to their credit, even though it would reduce the number of Scottish SNP MPs ) how many times do I have to explain that the UK gets the colour of government that England votes for?
Look at 2015: 56 SNP MPs, one solitary Scottish Conservative MP. Conservative majority.
Or 1997: Blair won with 418 seats. Even without the 56 Scottish Labour MPs, he'd still have had a majority (330 required).
Ironically, one of the few times Scotland has made a difference was in 2017, where the 13 Scottish Conservative MPs made the difference between May being able to form a minority Conservative Government with the support of the DUP. If she'd not had them, she'd not have been able to 
It's a commonly held fallacy that Labour "needs" Scotland in order to form a government. It doesn't. 