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The Survation poll for Good Moning Britain has put the Tories on 41.5 per cent, which is 16 points lower than the party’s position four weeks ago. Jeremy Corbyn is closing in on 40.4 per cent, while the Lib Dems are on 6 per cent, leaving Ukip behind on a dismal 3 per cent.

GETTY Theresa May's lead has plummeted, suggesting she is almost neck-and-neck with Jeremy Corbyn

Snap election 2017: The pictures politicians may not want you to see Sat, May 27, 2017 Protests, fights and daleks, it all happened when the politicians hit the campaign trail for the snap election Play slideshow Getty Images 1 of 48 A UK Independence Party supporter (L) scuffles with a pro-europe supporter ahead of a visit by UKIP leader Paul Nuttall to Hartlepool

Only 23 per cent of respondents believe the Conservative party have performed better than Labour in the election race GMB Survation Poll

The Conservatives had a commanding lead with the same pollster at the start of May, but more than half of those quizzed insist Jeremy Corbyn’s campaign has been better than Theresa May’s. Over the last four weeks, Britain has experienced two terrorist attacks, and Mrs May has faced a wrath of criticism for her inability to control the nation's security. During this time, Mrs May's personal credibility rating dropped by 10 points, while Mr Corbyn enjoyed an increase of 15 points, pushing his reliability score to 36 per cent.

Mr Corbyn's chances of getting into Number 10 seem to have increased as the number of respondents who thought he had a better campaign were at a staggering 51 per cent, 30 per cent of whom were Tory voters. Only 23 per cent of respondents believe the Conservative party had performed better than Labour.

However, half of the 1,103 residents polled in the Survation thought Mrs May would make a better Prime Minister than Mr Corbyn. The poll comes as Mrs May has faced a wrath of pressure from security experts to extend the number of days terror suspects are held for questioning.

GETTY After the London Bridge terror attack, many called for the suspension of the election

GETTY Hundreds gathered to honour the victims of the London Bridge terror attack