I have said for some time that I believe the next UK general election will be in June 2009, to coincide with the Euro elections. Now I'm not much of a gambler but I have had a look at the odds and June '09 is 5/1 and May '10 evens. So, according to them I think that makes June '09 second favourite.
Go here for the full odds.
I might just have a flutter.