Someone explain how even if you vote Liberal Democrats, Labour would still stay in power?

It was something David Cameron said, and I can't get my head around why that's possible. I'm a politics student and I know most features of the First-Past-The-Post system, but I don't see how this would work. So I obviously don't know enough - Is it to do with the constituencies and the amount of MPs there are for each party?





Also, how are the seats distributed in proportion to how much of the percentage a party wins in the UK general election?








Pleaaaaaase help!Someone explain how even if you vote Liberal Democrats, Labour would still stay in power?
The conservatives are relying on disenchanted Labour voters going Tory. Voting for the Liberal Democrats will remove some of that 'swing' that Cameron needs to bolster his own support, thus increasing the chances of Labour retaining power simply because no other party has polled enough votes to oust them.Someone explain how even if you vote Liberal Democrats, Labour would still stay in power?
Because LD votes are spread more evenly across the country the chances of them gaining many seats, even on a very high share of the vote, are slim. This would simply reduce the prospect of the Tories gaining those seats and leave Labour with the lions share.





If the LD's do well, Brown stays in power. Simple as that.





More to the point what I can't understand is why people feel that it's worth voting for a party that, in terms of it's manifesto, is almost identical to Labour anyway!





The ONLY large party that's not 'big state, big spend' is the Conservative party. They should be winning the race by a mile. Very odd.





We get the government we deserve so they say...