Excellent! I'm nearest the center. What do I win?
The leadership of the Lib Dems....
.....oh I forgot, they aren't a joke anymore and may actually form the next government. Then I will laugh
Well, they should win enough to provoke reform of our electoral system and get in n 5 years time

As it is it looks like they are going to win on votes, but end up with half the number of seats of either of the other two parties.
They need to be getting around 38% to get more seats in parliament than Cons or Labour in a hung parliament, and around 40% of the vote to win outright with a majority.
If he does really well in the next two debates and the papers keep up their promotion of him persuading people to vote it might just about be possible. If that happens I stand to win a lot of money - placed £5 at 774:1 odds a few weeks ago
