If Scotland does go, the whole issue of the voting system would be liable to come into play. The referendum on the Alternative Vote has been taken as meaning that it's been decided for this generation, but that referendum would be irrelevant, because the country in which it was carried out would have ceased to exist.

I would think it highly likely that with the departure of the sizeable bloc of Scottish Labour MPs making it very vulnerable, support for some move towards a more proportional voting system would be greatly increased in the English Labour Party. And in the electorate as well.