Scotland declaring independence would give the Tories a majority, kick Gordon Brown out of office, solve the West Lothian question and make it much easier for the Tories to remain in power from now on. If he palmed off the debts of RBS and HBOS onto the new Scottish government it'd solve a good fraction of the national debt too.

Fortunately SNP + Tories + PC don't have enough seats to pull it off so hopefully this option stays in hilarious alternative reality land.