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A senior Tory MP has warned his party could "fall apart" as yet another leak reveals the devastating cost of Brexit .

Remainer Dominic Grieve highlighted the Conservatives' "deep, ideological division" after weeks of battles at the top of the party over how close Britain should be to Europe.

And he confessed: "There are deep divisions. There's no point in trying to pretend they don't exist.”

The ex-minister's frank remark came after further leaks of the government's now-notorious secret analysis showing the regional impact of different models of Brexit.

Last night it emerged the document shows Britain could have to borrow an extra £80billion over 15 years if there is no deal.

Today Theresa May's Brexit 'war cabinet' of elite allies will meet for the second day in a row in a bid to thrash out the path ahead.

(Image: REX/Shutterstock) (Image: AFP)

Meanwhile the Prime Minister faces criticism today from Remainer ex-minister Nicky Morgan, who blasted the decision not to release a paper on the financial services industry.

The Treasury Committee chairwoman sniped: "Nothing undermines a negotiating position more than not having one.”

And further pressure has come from the anti-Brexit group Best For Britain, which it emerged today has been financed with £400,000 from billionaire George Soros.

Mr Soros, one of the world's richest men who made a billion dollars betting against sterling on Black Wednesday in 1992, previously said it was possible that the UK would apply to rejoin the EU soon after Brexit.

Best for Britain chairman Lord Malloch-Brown, a former minister and diplomat, confirmed: “He is an important and valued donor but his funding is one amongst many sources.”

Last night Theresa May turned her head to Brexit at the biggest fundraiser in the Tory social calendar, the elite Black and White Party.

(Image: Getty Images Europe) (Image: DAILY MIRROR)

Speaking to millionaire donors at London's Natural History Museum, she accused Jeremy Corbyn of "exploiting populist politics" and vowed a "completely new alliance" with Europe.

But at virtually the same time Mr Grieve, the former attorney general, told BBC Newsnight: "Clearly there can come a point in a party's process where the ties of loyalty and affection get so stretched that it snaps.

"That's when a party starts to fall apart.

"The difficulty is we are a party which historically has been very pragmatic in its approach to problems.

"And we have just introduced, by revolutionary means of a referendum, a deep, ideological division.

"For a pragmatic party to get over that and absorb the ideological division and then come together to deliver pragmatic government is clearly an immense challenge.”