Despite the Tories' lead in the polls, there've been signs recently that we might be heading for a hung Parliament.
It was almost exactly 36 years ago that a general election last produced an inconclusive result.
In a new series of the Sunday Supplement, 'Hung, Drawn and Thwarted,' Rob Orchard tells what happens when no party has a majority in the House of Commons. He begins tonight with that extraordinary election in February 1974.
In part two, Rob looks for clues from those who lived through the Lib-Lab Pact in the 1970s and the period of minority government under John Major in the 1990s. He asks how can a minority government survive when a parliament is Hung, Drawn and Thwarted?"