Northern voters will learn today if Ulster Unionist leader David Trimble will still be in the House of Commons as counting gets under way.
Mr Trimble is fighting for his political life in his Upper Bann constituency, and the Rev Ian Paisley's Democratic Unionists believe their candidate, David Simpson, can claim the biggest scalp of the British general election.
But Sinn Féin is also hoping to capture another Nobel Peace Prize winner's seat in Foyle, where the party general secretary Mitchel McLaughlin believes he can win former nationalist SDLP leader John Hume's constituency.
SDLP leader Mark Durkan is defending the seat, a do-or-die constituency for the party.
There were claims last night in Derry that turnout in the constituency could be in high 60s.
When the last Westminster parliament was dissolved, the DUP had six seats - one gained when Jeffrey Donaldson defected from the Ulster Unionists.
The UUP had five MPs, Sinn Féin four, and the nationalist SDLP three. During the election campaign, the DUP aggressively targeted all five UUP seats. Sinn Féin was hopeful it could take two of the SDLP's, including Foyle.