Left wing vs Right wing. The truth behind the lies.
The three main parties in the 2010 general election were conservative, labour and lib dem with 36.1% 29.0% 23.0% votes respectively. Given lib dem and labour are (supposedly....) left wing, there is a high probability these voters will rank each other in turn. Ie, labour lib dem, lib dem labour
I strongly disagree with that, the Lib Dems social policies are very different to Labour, which are totalitarian in comparison, the Conservatives are much more similar and would be my second choice as a Lib Dem supporter, I would group Labour with the BNP at the bottom.

I don't get what you mean, are you saying no one at all will have more than one choice? Because if just one person has more than one choice then it happens.