This is a more sophisticated method than the standard application of a uniform national swing to predict how each seat will go in the election.
The findings again weakened sterling which had earlier fallen nearly a cent against the USA dollar on the YouGov model before rising on a Kantar poll which showed May's lead had increased to 10 percentage points.
The Conservative Party Campaign believes the election results in up to 30 or 40 seats are now in doubt, as unexpectedly high numbers of voters switch back and forth between backing the Tories and Labour.
Until two weeks ago, U.K. Prime Minister Theresa May had appeared on track to secure a landslide parliamentary majority for the governing Tories.
When gains and losses for other parties are factored in, the modeling suggests the Conservative Party's tally could be 16 seats below the 326 seats required to be able to govern alone, leading to a "hung parliament".
He added: "The leadership has to show that it has a vision that can inspire people, not just people that have joined the Labour Party full of enthusiasm, but the people out there who have better things to do than talk about politics".
In the strongest signal yet that the election is much closer than previously thought, May's lead has collapsed from 24 points since she surprised both rivals and financial markets on April 18 by calling the election.
"None of us are stupid, none of us are insane, we all may be wrong in the end or some of us may be wrong, but it's just a hard problem", said Ben Lauderdale, an associate professor at the London School of Economics who helped create YouGov's new electoral model. The current UK Prime Minister was challenged about several issues over which she's been noted to have had a change of heart, like the abrupt shift in the recent plans of financing long-term care.
Mr Cooke said: "The more people see of Jeremy Corbyn, the more they appreciate what he is trying to do, the wheels seem to be coming off the Tory wagon".
Nicola Sturgeon's SNP with a forecasted 50 seats would be the only party with enough backing in Parliament to prop up the Conservatives.
Our central case remains that the Conservatives will win comfortably on 8 June with a majority approaching three figures.
According to the Telegraph's poll tracker, the Conservative's lead has now narrowed to 8.7 points, which could still give them an overall majority.