Concessions to the right: Theresa May: AFP/Getty Images

European leaders today scrambled to prepare for a “chaotic” no-deal Brexit after Theresa May gave concessions to the Tory Right to survive a week of rebellions, savage infighting and open threats to her leadership.

In Brussels, European Commission sources said officials will issue a report tomorrow advising all EU states to urgently step up preparations for Britain crashing out on March 27 next year without an agreement. Doubts that Mrs May can succeed in getting backing for her Chequers deal in Parliament increased after a breakdown in trust within the Tory party during Commons rebellions last night and on Monday.

A vote to create a customs union if a trade deal fails was defeated by six votes — a victory for the Prime Minister. With MPs complaining about the bruising tactics of the whips and Brexiteers, a second Tory MP called for a “Government of national unity.

The scenes of chaos were watched with concern across the Channel. An EU source said tomorrow’s document would be strongly worded and would warn governments to get ready for customs controls, flight restrictions and extra checks on goods and food.

It will be issued just as new Brexit Secretary Dominic Raab makes his maiden trip to Brussels to meet EU chief negotiator Michel Barnier.

“It is definitely the message that a hard Brexit, or crashing out, is becoming, almost daily, a more likely possibility,” one senior EU official told the Evening Standard. “Nothing has been agreed and the Chequers deal is becoming more and more complicated as it passes through the Commons.”

Brussels trip: Dominic Raab (REUTERS)

Taoiseach Leo Varadkar hosted a special cabinet meeting in Ireland today to “discuss contingency plans for a range of scenarios, including a no-deal Brexit”. The Irish government said these would deal with “east-west trade” between the UK and Republic, excluding measures to erect any hard border between Northern Ireland and the South.

Greek minister for Europe George Katrougkalos criticised the Chequers plan for reflecting “a desire to eat the pie and have it too”. He warned: “I am not very optimistic about the viability of the latest proposals.” Chequers was a starting point for talks but “very vague”, he added. He called for the UK “to make itself clear and have a position that could be negotiated with us”.

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Pieter Omtzigt, the Dutch parliament’s Brexit liaison officer, said: “We are actively preparing for a hard Brexit. But the real danger is not a hard Brexit, the real danger is a chaotic Brexit.”

He criticised the slow delivery of the Chequers plan. “I feel concerns it is a bit late in the day, that one year and four months after tabling Article 50 notification the UK makes a proposal which is a good starting point, but a starting point. It would have been helpful if that paper had been on the table when the negotiations started.”

He said the Dutch were concerned that a hard border would bring ports to a standstill. “We are a trading nation, we cannot afford our customs system to completely get stuck because we also have to check all the British exports.”

Cabinet Office minister David Lidington told the BBC the Government would be setting out more details of its own preparations for a no-deal scenario in the coming weeks. But he insisted on Radio 4’s Today: “Our energies are going into negotiating a positive way forward with out European counterparts. That is what we expect to happen.”

The EU has already published 60 sector-by-sector “preparedness notices”, on everything from financial services to data flows. Downing Street announced the Prime Minister will visit the Irish border later this week to hear the Brexit concerns of local people and attempt to promote her Chequers blueprint.

She claimed her plan would offer seamless trade and travel: “I fully recognise how their livelihoods, families and friends rely on the ability to move freely across the border to trade, live and work.” Tory MP Anna Soubry, a Remainer, accused Mrs May of letting Brexit hardliner Jacob Rees-Mogg “run the country”. She spoke after Mrs May gave concessions to his European Research Group of MPs which appeared to conflict with the Chequers plan.

Ms Soubry called for a government of national unity to deal with Brexit, and said whipping during last night’s Brexit votes was an “appalling spectacle”.