Modeller is right ! Our voting system here in Britain may leave no choice but to have a coalition, like we had in 2010. But it needn't have been Tory/Lib. It could have been Labour/Lib, or even Tory/Labour...why not ? Its what we had during WW2.
It would appear that in 2015, there is a possibility that no one party will have an overall majority of seats in Westminster, so we must prepare ourselves for another coalition of some sort. This was never a problem during most of the years since 1945, as two parties totally dominated the political scene. But now that the minor parties are getting some support, albeit very small, the possibility of coalitions will continue. We are a free country and people must vote how they think fit but people who are tempted to vote for the minor parties, especially the more loony-tune ones, should think just what their vote will actually mean. To use the Green Party, purely as an example...what possible difference will it make if they double their number of MPs in 2015, from 1 to 2 ?
Are coalitions such a bad thing ? There are a lot of countries in the West that seem to have them permanently, and they all seem to manage somehow.