Low turn outs usually support the Tories whose hardcore vote anyway. When voting is higher then Labour do better. I am not sure what the impact is on Liberal vote.
Though I suspect that 4 years on the situation will not be conducive to a Coalition victory. The liberals will probably be set back substantially by their policies, The Tories will probably do a little better. The real impact will be on Labour who might do very well depending on how the economy is going.
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