Labour has surged in the most recent polls with Corbyn coming within single digits of the Tories.
Theresa May has seen her poll lead slump from a projected majority of 150 seats to around 46.
The PM called the snap election to ‘strengthen her hand’ but she is now seeing a poll give her less than a 10 per cent lead.
Labour has risen to between 33 and 35 per cent.
The Conservatives have struggled after they launched their manifesto this week.
They adopted a more interventionist stance but controversially floated plans to restrict free school meals and pay for social care.
May’s plan was slapped as a ‘dementia tax’ by critics as elderly people who can afford to own a house will be made to pay for their care up until their final £100,000.
In a YouGov poll 40 per cent of Britons opposed the Conservative plan.
Corbyn has since claimed pensioners will be £330 a year worse off under the plans set out in the Tory manifesto.
Although the lead has been cut it has been met with some scepticism.
Anna Turley, Labour MP for Redcar, said on Twitter it was not about stacking up vote share and poll numbers.
Instead, she said, Labour needed seats. She wrote: ‘It’s like possession stats in football. It’s goals that matter.’
Others pointed to the collapse in the Lib Dem vote under Tim Farron as many Remain voters turn to Labour.
While those that remember Miliband’s soaring polls numbers ahead of the 2015 election have pointed out similarities.
Miliband lost the election to Cameron who gained a 12 seat majority.