Scottish independence and they're right back in the game
Would they be though? In the last ~7years labour hasn't exactly won back many of its traditional Scottish seats as their politics are too similar to those of the SNP where as the Tories currently hold 6 of Scotland's 59 Westminster seats.
But lose those and they lose 30 seats from the FPTP majority requirement and that's a big lump.
Then inevitably, they will argue losing those seats from the overall will have to lead to a redrawing of boundaries . So they will gerrymander their way to the greatest chance of winning also.
Thing is... should this happen, the emergency plan could be Scottish independence and they're right back in the game?