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EghtesadOnline: Prime Minister Theresa May could lose control of parliament in Britain's June 8 election, according to a projection by polling company YouGov, raising the prospect of political deadlock just as formal Brexit talks begin.

In stark contrast to opinion polls that have until the past week shown May on course for a big win in the snap election she called, the YouGov model suggested May would lose 20 seats and her 17-seat working majority in the 650-seat British parliament.

According to Reuters, the YouGov constituency projection, based on 50,000 interviews over the course of a week, showed May would win 310 seats, down from the 331 seats won by her predecessor David Cameron in 2015.

The opposition Labour Party could win 257 seats, up from 232 seats in 2015, YouGov said. Smaller parties, including the Scottish National Party and Northern Irish parties, could win 83 seats, the Times newspaper quoted YouGov as predicting.

If the YouGov model turns out to be accurate, May would be well short of the 326 seats needed to form a government in June, when formal Brexit negotiations are due to begin.

May called the snap election in a bid to strengthen her hand in negotiations on Britain's exit from the European Union, to win more time to deal with the impact of the divorce and to strengthen her grip on the Conservative Party.

But if she does not handsomely beat the 12-seat majority Cameron won in 2015, her electoral gamble will have failed and her authority could be undermined just as she tries to deliver what she has told voters will be a successful Brexit.

If May fails to win an overall majority, Britain would be thrust into political turmoil: May would be forced to strike a deal with another party to continue governing either as a coalition or a minority government.

That would raise questions about the future of Brexit, the $2.5 trillion economy and British policy on a range of issues including corporate taxation and government spending and borrowing.

Sterling fell by almost a cent against the U.S. dollar after the YouGov data. The pound was trading at $1.2838 at noon GMT.

For scenarios on the election, click on:

 

LANDSLIDE TO LOSING?

When May stunned politicians and financial markets on April 18 with her call for a snap election, opinion polls suggested she could emulate Margaret Thatcher's 1983 majority of 144 seats or even threaten Tony Blair's 1997 Labour majority of 179 seats.

But polls had shown May's rating slipping over the past month and they fell sharply after she set out plans on May 18 to make some elderly people pay a greater share of their care costs, a proposal dubbed the "dementia tax" by opponents.

A total of seven polls carried out since the May 22 Manchester suicide attack have shown May's lead over the Labour Party narrowing, with some suggesting she might not win the landslide predicted just a month ago.

When asked about the possibility of losing her majority, May said: "The only poll that matters is the one that is going to take place the 8th of June."

Recent opinion polls have shown May's lead has contracted to a range of 5 to 14 percentage points.

"Once the Conservative lead falls below 7 points we are potentially in the world of a hung parliament," said John Curtice, a leading psephologist who is president of the British Polling Council.

"Support for Labour among younger voters has gone up and gone up dramatically but then the crucial question is whether these young people will come out to vote," Curtice said.

YouGov, using a technique called "Multilevel Regression and Post-stratification", uses a range of factors - including demographics, past elections and voter profiles - to build a model which can come up with an estimate of how the vote will be split in individual constituencies.

 

MODELLING ELECTIONS

Michael Ashcroft, a former Conservative Party donor who funds polling, uses the same types of modelling as YouGov but came up with a very different estimate of the election: May winning 396 seats and Corbyn winning 180 seats.

Other projections suggested May would win soundly. The Electoral Calculus website, which predicts the results based on polls and electoral geography, said May would win 371 seats and Labour 205 seats.

Betting markets give a more than 80-percent probability of May winning an overall majority, though betting markets were wrong ahead of the unexpected Brexit result in the June 23 referendum last year.

YouGov acknowledged that its predictions were controversial and allowed for a wide margin of error, adding that the samples in each constituency are small.

YouGov allowed for big variations in the outcome of the election, ranging from as high as 345 seats for the Conservatives, 15 more than their current number, to as low as 274, the pollster's chief executive, Stephan Shakespeare, said.

Brexit Theresa May UK Parliament UK elections