What is a hung parliament? What happens if there is a hung parliament in the UK?
The Conservatives could fall short of an overall majority by 16 seats, according to YouGov’s first constituent-by-constituent estimate of the result.
The shock projection found that the Tories would get 310 seats in the general election, well below the 326 needed for a majority government.
It put Labour as the second biggest party with 257 seats, the SNP at 50 seats and the Liberal Democrats way behind at 10 seats.
The projection has rattled the Conservative campaign which has had a clear lead in the polls and looked on track for a landslide victory until now.
YouGov found Stephan Shakespeare said that the UK is entering “hung parliament territory” but there is still “leeway either side” of the estimates.
What is a hung parliament?
The Conservatives need more than half of all MPs in the House of Commons in order to form a majority goverment.
If the Tories do not get enough seats to win a majority then Britain will be left with a hung parliament.
In a hung parliament, there is no overall control and no party can pass laws without support from other parties.
In this scenario, Theresa May would remain Prime Minister until it decided would will form the new government.
What happens if there is a hung parliament?
In the event of a hung parliament, two or more parties can come together to form a coalition government if they have a majority of seats between them.
In 2010 David Cameron’s Conservatives and Nick Clegg’s Liberal Democrats agreed to form a coalition government to govern the nation.
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Alternatively, the Conservatives might decide to try and govern with a minority of seats in the House of Commons.
If the Tories formed a minority government then it would risk defeat on important votes, which could in turn spark fresh elections.
Theresa May's hand would be significantly weakened as she enters EU exit talks because she has promised to give Parliament a vote on the final Brexit deal.
The Tories could strike confidence-and-supply deal with smaller parties as long as they agree to support the government on financial matters and confidence votes.
The Conservatives would get the first chance to create a government. If they cannot do so, Theresa May would be forced to resign.
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The Parliament website says: “The Prime Minister only has to resign if it is clear that they cannot command a majority of the House of Commons on votes of confidence or supply.
“This would be the case if the incumbent government fails to make a deal with one or more of the other parties, or if they lose a confidence motion in the House of Commons.”