Britons may cast a vote for historic change as they head to polls in what has been one of the closest campaigns in the nation's modern history. Most expect a result without any clear winner; although so far Labour Prime Minister Gordon Brown has been the campaign's clear loser. The shotgun election season has seen the rise of the Liberal Democrats' Nick Clegg. His party's popularity will likely cause a hung parliament: Conservatives, led by David Cameron, may win the most seats in parliament but only a plurality. Said one analyst,"There's still a lot of head-scratching going around, and that might not change for weeks."