Well seen as there have been more replies on here;

The Alternative Vote - widely referred to as AV - system sees voters rank candidates in order of preference. Anyone getting more than 50% of votes in the first round in a constituency is elected as MP. If that doesn't happen, the candidate with the fewest votes is eliminated and their second choices allocated to the remaining candidates. If one candidate then has more than 50% of the votes in this round they are elected. If not, the remaining candidate with the fewest votes is eliminated and their second preferences (or third preferences if they were the second choice of someone who voted for the first candidate to be eliminated) reallocated. This continues until one candidate has 50% or more of the vote in that round

Referendum??

The poll options are ridiculous. I think you need to think again.

What a muppet - wrong forum, spelling mistakes all over the shop, and ridiculously biased poll options

Seriously though in response to the OP, i'll be voting for AV just because, although it is a pretty pityful change, if the vote doesnt succeed i dont think we will get a chance for proportional representation for absolutely ages. Saying that, a part of me does want it to fail just to see the look on Nick Clegg's face

Trying to encourage people to vote for what the poster perceives to be a fairer voting system through an inherently biased vote – superb irony