POD: As part of the Lib-Lab pact, in 1977, the Labour party had to introduce the single transferable voting system, and lets assume it gets through parliament one way or another. So how would this affect all elections afterwards? I image a lot. As STV voting has no spoiler effect let's try, as well, to make parties more likely to split apart as the new system is a lot fairer to new parties, making them able to survive.