Ipsos Mori's head of political research, Gideon Skinner, said: "Here's more evidence of the Conservatives' wobbly week, with Labour improving again and the last two weeks of campaigning seeing a big hit to the Prime Minister's personal ratings".
May praised her performance when she stood in for the prime minister at a televised election debate on Wednesday against all the leaders of Britain's other main parties, after May herself declined to attend.
"I've said that I think no deal would be better than a bad deal".
She continued: "I could have stayed on doing that job for another couple of years and not called an election. I had the balls to call an election".
Mrs May faced hostile questions over her plans for elderly care, dubbed the dementia tax, and her failure to put a figure on the cap on social care costs she promised after consternation in Conservative ranks over the policy as it was set out in the manifesto.
Listing proposals to pump more resources into education and mental health care, Mr Corbyn said: 'We have to respect the needs of people and challenge all of us to say that if we want to live in a society that genuinely cares for all, we've got to be prepared to deal with issues of inequality and pay for it. It is subtitled: "On June 9th, this man could be Prime Minister".
Trump hits out at 'fake news' following Kushner reports
After his surprise victory, Mr Trump insisted that he and Ivanka Trump take up jobs within the West Wing of the White House. President Donald Trump and first lady Melania Trump walk from Marine One across the South Lawn to the White House.
After being asked about nuclear weapons by an audience member he was probed by David Dimbleby if he would deploy nuclear weapons.
Asked if he would use nuclear weapons in a preemptive capacity, Corbyn insisted that he would not push the red button first and would instead push for a global disarmament.
Mrs May refused to give a figure for how much she would be willing to pay the European Union in Brexit "divorce" settlement, and she was also challenged over a U-turn on controversial social care plans for England, which saw an as-yet unknown cap added to elderly care costs.
The Labour leader attacked Mrs May for failing to sign a joint letter with leaders of Germany, France and Italy condemning President Donald Trump's decision to pull the United States out of the Paris Accord on climate change.
He was challenged on the Labour Party's response to antisemitism, saying an investigation into Ken Livingston, suspended over comments about the Holocaust, "may or may not continue".
The online poll of 1,049 people was carried out on June 3.