THERESA May is preparing to hand of tens of millions more to the DUP to get Brexit over the line - as their leader pleaded for a Cabinet rebellion.

Arlene Foster urged the PM's top team to rise up to halt a UK and EU compromise plan, as senior Tories plotted a cash injection to their crucial Northern Irish allies.

The DUP fear the government could agree with Brussels to give the province different customs rules as a Brexit insurance offer.

Relations are fraught, after DUP MPs vowed to torpedo the Budget later this month and vote down any deal that includes that “backstop” plan.

Publicly Mrs May talked tough to say “the DUP will do what the DUP do” but The Sun can reveal behind the scenes Ministers and senior Tories have discussed more money to continue propping up the Government if they do not vote down her plans.

Government sources say they are confident a further payment – on top of the £1 billion agreed last year – will pave the way for a deal.

After travelling to Brussels to voice her concerns, Mrs Foster said that the EU “wants to place an effective one-way turnstile from Northern Ireland into the rest of the United Kingdom.

“Trade from Great Britain into Northern Ireland would be in danger of restriction.

She warned "that is not the best of both worlds. That is the worst of one world” and told Ministers to block the PM from agreeing any such move.

And unionist big hitter Sammy Wilson warned that any attempt to “bribe, bully or browbeat” the DUP into voting with the Government on Brexit will not work.

He was backed by senior Brexiteer Tory Steve Baker warned that the DUP are “absolutely furious” and could not be bought off, adding: “No one should underestimate their resolve.”

However Cabinet Minister David Mundell warned the DUP that the alternative to Mrs May's Brexit was Jeremy Corbyn in No10.

He said: "We're in an on-going dialogue with the DUP, who are forthright and very experienced in tough negotiations.

"I'm sure they too will be persuaded the alternatives - of no deal or potentially a Corbyn government - would not be of benefit to them or Northern Ireland."

Pensions Secretary Esther McVey became the third Cabinet Minister this week to distance herself from Mrs May's Brexit plans.

Asked if she backed the Chequers blueprint the Brexiteer pointedly said: "I am completely supportive of the Prime Minister."