Theresa May's controversial Brexit plans could cost the Tories 25 seats at the next election and hand the keys to No10 to Jeremy Corbyn, new analysis today shows.

The PM's Chequers proposals sparked fury among Brexit voters - triggering a Tory grassroots revolt, a wave of resignations and a fall in the polls.

Politics professor and pollster Matthew Goodwin said angry voters could desert the Conservatives and switch to Ukip - leaving marginal seats to fall to Labour.

Former Home Secretary Amber Rudd's seat of Hastings and Rye is among those which could turn red, Mr Goodwin warned.

The analysis piles further pressure on Mrs May who faces renewed speculation that she could face a leadership challenge when MPs com back from their summer holidays.

Theresa May (pictured left last week at a WW1 event) has triggered a massive Brexiteer backlash after publishing her Chequers plan. It triggered the resignation of Boris Johnson (pictured, right, at his Oxfordshire home yesterday giving cups to teas to reporters)

While the bitter Tory civil war has been fuelled by the growing backlash over the Tory leadership's decision to investigate Boris Johnson over his burka remarks.

Many Remainers have seized on the comments to pile into Mr Johnson - a leading Brexiteer -and warn that he is not fit to lead the Tories or the country.

Mr Goodwin, professor of politics at Kent University, said: 'Unless things somehow change, the Conservatives are stuck between a rock and a hard place, stuck in the middle of a partial realignment.

'On the one side they've irritated Remainers and on other have delivered a Chequers Brexit proposal that has irritated their core groups and fanned Ukip flames.'

He said that support for Ukip is now far higher than it was at last year's election amid fury at Chequers.

While out of the 14 polls carried out since the proposal was published in July, just one put Mrs May's party ahead.

It would only take a small swing of support to Labour for the Tories to lose No10 to Mr Corbyn and his allies, Mr Goodwin said.

He said a swing of just two points to Labour would give Mr Corbyn enough seats to form a Coalition, while a four per cent shift would mean he would have an outright majority.

Mr Goodwin said: 'Were an election held tomorrow, then something of a perfect storm could easily form above the Conservative Party.'

He said the Tories face a big battle to hang on to their pro Brexit but marginal constituencies as voters peel off back to Ukip.

According to the average scores of polls carried out in the wake of the Chequers plan being published, Tory support has dipped

And he warned that this is a big problem for the Tories, who under Mrs May have become more dependent on blue collar working class voters who are worried about immigration.

While middle class graduates have deserted the Tories and baked Labour in their swathes.

Mr Goodwin said the Tories do not stand much of a chance winning over these middle classes in the short term, and the next election could be decided on who manages to persuade their supporters to go and vote.

He said: 'Conservatives need to rebuild their coalition and obviously reach out to Remainers, social liberals, graduates & minorities. That's a no-brainer.

'But short term, those groups are simply never going to consider the Conservatives in the current highly divisive electoral cycle.

'Brexit Land will cast a long shadow over British politics. So, the next election will be a game of differential turnout on both sides - who can get their people out.'