Most appear to think that a convincing victory for May would provide political certainty for the next five years, giving her a freer hand in the Brexit negotiations to make the compromises necessary for a deal.
When May stunned political opponents and financial markets by calling the snap election, her poll ratings indicated she could be on course to win a landslide majority on a par with the 1983 majority of 144 won by Margaret Thatcher.
A Labour majority or Labour-led coalition would see the United Kingdom bid to stay in the Single Market, a meaningful parliamentary vote on the terms of the negotiation deal and the potential for a second referendum if allied with the Lib Dems, SNP and/or the Green Party.
"They underestimated us didn't they?"
Any significant deviation from the polls has the potential to trigger the kind of chain reaction the referendum vote itself led to as leaders and parties scramble to react to the viewpoints of the public and the landscape laid out before them. Three terror attacks have taken place since March, leaving 34 dead and around 200 injured, and all involved assailants who were known to the authorities.
Support for the Conservatives stood at 46 percent, up a point from ICM's previous poll published on Monday.
U.S. President Donald Trump has blundered into helping Corbyn directly in the final week of the campaign by attacking London's Labour mayor, in the aftermath of the London Bridge terror attack.
Veteran left-winger Corbyn, 68, was the surprise victor in a contest that followed the resignation of centre-left leader Ed Miliband after disappointing results in the 2015 general election.
May said negotiations with the European Union would begin in less than a fortnight and the question for voters was about who they trusted to deliver the best deal for Britain. Latest surveys put her party between 12 and one point ahead. A party needs to win 326 seats to form a majority government.
Britons have until 2100 GMT to vote, and there will be an exit poll as soon as voting ends.
In the most recent attack, seven people were killed on Saturday when three men drove into pedestrians and went on a stabbing spree in central London before being shot by police.
"The Tories alone are committed to seeing Brexit through in full", the Sun said in a full-page editorial. GAMBLE Sterling rose by almost half a cent against the US dollar after the ICM poll was published, easing jitters in financial markets about the possibility that Labour under its hard-left leader Jeremy Corbyn could pull off one of the biggest election shocks in modern British history. "Or something different", Corbyn told supporters in Colwyn Bay, north Wales, to cheers and applause. "We can have a future of hope for the many, not the few", he said in an interview with the Daily Mirror.
The ICM poll of 1,532 adults was conducted between 6 and 7 June.
British police hunting for a missing Frenchman found a body in the river, which could lift the toll to eight. Security has been increased nationwide and the violence has dominated the final weeks of campaigning.
As May vowed to bring in new anti-terror measures, Corbyn criticized cuts to the police under the Conservatives, which saw the number of officers plummet by nearly 20,000 between 2010 and 2016. May hit back with a pledge to crack down on Islamist extremism and strengthen police powers.
Emphasising the need for sufficient budget for security, Corbyn has said, "We won't defeat terrorists by ripping up our basic rights and our democracy", he said. Business laws, working directives, human rights, university programmes, funding for projects are all also among the many things that will be directly influenced by negotiations.
Italy said it had flagged Youssef Zaghba as a potential risk after he moved to England a year ago, while Khuram Butt was known to British security services.
Their rampage followed a similar attack next to British parliament in March, in which assailant Khalid Masood was shot after killing five people.