Not a new idea but I hope it's a good one. What if Gordon Brown had gone with his initial plan and called a snap general election in 2007?
Oddly enough I don't think this would result in such a big change,at least not initially. Given the state of the polls at the time and the mountain of seats the Tories would have to climb it seems to be that the most likely result would be that Labour would lose a few seats but keep its majority. Cameron is also likely to stay on - his leadership was conceived as a "two-term project" with the hope that he'd reduce Labour's majority in one election and take over in the next. Plus in addition to gaining seats from Labour Ming Campbell's leadership means they'll probably take a fair few Lib Dem seats as well.
So what will the consequences be? Brown will be more secure and probably face less opposition -Miliband's abortive coup seems unlikely in this scenario. Still the expenses scandal and the Great Recession are both on the horizon, not to mention a variety of lesser problems. As I said Cameron will probably stay leader but he's likely to face more dissent, especially since his leadership up to that point hadn't gone very well. The right will probably get more concessions thrown their way. It seems to me that the most likely end result would be a Cameron majority government in 2012.
Any other ideas?