Scotland's First Minister has warned another independence vote may be "inevitable."
One of the biggest questions is whether U.K. Prime Minister David Cameron will resign.
Cameron says Scots "emphatically" rejected independence last year.
Douglas Alexander and Gordon Brown's former seats have fallen to the SNP
The Tories have beaten projections in the election.
The unpredicted result in the tight election came after Conservatives trounced Labour in key seats.
Final opinion polls showed Prime Minister David Cameron's Conservatives and Ed Miliband's opposition Labour Party almost in a dead heat.
Two polls on the final day of campaigning found Labour and the Conservatives tied
Cameron's "Little England" policies do not augur well for a U.S. foreign policy which encourages like-minded states to share the burdens of leadership.
Polls suggest Scottish National Party could form third biggest party in UK Parliament after May 7 election.
Opinion polls show the SNP is set to take dozens of seats from the Labour Party in Scotland.
Alex Salmond, out-going First Minister of Scotland and figurehead of the independence movement, plots his next moves against the British state
Jim Sillars, former Deputy Leader of the SNP, has warned of tough sanctions for pro-Union banks and big business in the event of a Yes victory
"Her Majesty's government is not planning for Scottish independence," a spokesman told Newsweek