Chancellor Philip Hammond, a strong Remain campaigner, and Trade Secretary Liam Fox, a leading Brexiteer, put on a display of unity with a joint pledge that echoes Theresa May's oft-repeated remark that "Brexit means Brexit".
Senior members of the Government have declared the United Kingdom will not seek to remain in the European Union "by the back door" and will leave both the single market and the customs union when Brexit happens in 2019.
The paper says that a "formal position paper to be published next week by the government" which will state that ministers are sticking with plans for a "light touch" customs border.
But in a joint article for The Sunday Telegraph newspaper, they agreed there should not be a "cliff-edge" when Britain leaves in March 2019.
It added that businesses should be assured there would be no "cliff edge" despite fears expressed that the UK could crash out of the EU without reaching a deal, which would see UK-EU relations revert to World Trade Organisation rules.
Britain's Foreign Secretary Boris Johnson (L) and Britain's International Trade Secretary Liam Fox leave after a Cabinet meeting at 10 Downing Street in central London on June 27, 2017.
"We will await publication of the full position paper before making further comment and trust that the Irish government will engage seriously and pragmatically in helping to secure an agreement that benefits everyone".
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However, Liberal Democrat leader Sir Vince Cable said it was clear that Mr Hammond had lost his power struggle with the Brexiteers.
He said: "People say we must respect the referendum. Supposedly he was looking for a compromise to keep Britain within the customs union and single market as long as possible", he said.
The jointly penned article appeared created to reassure those in favour of a clean break, but will do little to comfort those fearing the consequences of a so-called "hard Brexit". Previously he had been downplaying the need for such a lengthy interim stage.
"But we are also clear that during this period our borders must continue to operate smoothly; goods bought on the internet must still cross borders; businesses must still be able to supply their customers across the European Union and our innovative, world-leading companies must be able to hire the talent they need, including from within the EU".
And the Prime Minister will be hoping it quells criticism about a lack of clarity from the Government on its negotiating position.
But Soubry, who has become the most vocal pro-European among Tory MPs, was careful in her article to avoid saying what would constitute the "hard Brexit" that she could not accept.