A volunteer checks to see that the ballot box is empty as votes are emptied onto the table for counting inside the English Institute of Sport, including ballot papers for the constituency of Sheffield Hallam, where Liberal Democrat leader Nick Clegg is standing for the seat in the 2015 general election in Sheffield, U.K., on Friday, May 8, 2015. David Cameron is on course to remain prime minister at the head of a minority government after the U.K. general election, an exit poll and early results indicated.Photographer: Paul Thomas/Bloomberg via Getty Images