The breakup of the UK is “at stake” if a new deal on post-Brexit trading arrangements in Northern Ireland is not reached, a senior DUP politician warned.

Sammy Wilson MP said his party will continue with its protest at Stormont if EU rules aren’t removed in the region – saying this threatens Northern Ireland’s place in the union.

This has been a key sticking point for Prime Minister Rishi Sunak, who is battling to reach a new settlement with Brussels to fix issues with the controversial Northern Ireland Protocol.

The mechanism was agreed as part of the Brexit deal to avoid a hard border on the island of Ireland – which all parties agreed was necessary to preserve peace.

But because the Republic is in the EU, it means traders in Northern Ireland have to comply with single market rules, creating friction on the flow of goods between the region and the rest of the UK.

Mr Wilson told Sky News the DUP wants Northern Ireland to be “treated in the exactly the same way as the rest of the United Kingdom. In other words, that the laws which apply in Northern Ireland are UK laws, not EU laws”.

He added: “Essentially if a deal is agreed which still keeps us within the EU Single Market, as ministers in the Northern Ireland Assembly we would be required by law to implement that deal.

More on Northern Ireland

“And we’re not going to do that because we believe that such an arrangement is designed to take us out of the United Kingdom and indeed would take us out of the United Kingdom, because increasingly we would have to agree EU laws which diverge from UK laws and in doing so would separate our own country from the rest of the United Kingdom.”

Read More:
What is the protocol and why does it matter?
What is the Brexit deal being discussed between UK and EU and will it be backed in Northern Ireland?

Mr Wilson said the prime minister has a choice whether to “protect the union or the European Union”.

“It’s unreasonable to ask unionists to participate in an arrangement which is designed for the break-up of the union, and that’s what’s at stake here. And that’s why this is a historic moment for the prime minister,” he said.

Asked if he thought there would be a deal this week, as reports have suggested, he said: “No I don’t. He (Mr Sunak) realises that there are barriers and hills to climb. He knows the kind of issues that have to be dealt with. I hope he does go into negotiations with a full understanding of what is required.”

No ‘final deal’ yet

Downing Street has kept quiet about the details of what could be in the new deal.

On Monday, the prime minister’s official spokesperson said negotiations were continuing to resolve the outstanding issues and “you will hear our position should a deal be agreed”.

Foreign Secretary James Cleverly, Northern Ireland Secretary Chris Heaton-Harris and the European Commission’s Maros Sefcovic will hold talks by video link on Monday afternoon.

The PM’s spokesman insisted there was not yet a “final deal” – and refused to say whether MPs will get to vote on it should there be one.

It comes amid mounting concerns a Tory civil war will stop an agreement getting over the line.

Pressure mounts on Sunak

Veteran Tory Eurosceptic Sir Bernard Jenkin said that any deal which did not lead to a return to powersharing at the Stormont Assembly by the DUP – which walked out in protest at the protocol early last year – would be “completely disastrous”.

However, ex-justice secretary and Brexit critic David Gauke said the DUP “cannot accept any realistically negotiable outcome and nor can some Tory MPs because they’re purists or opportunists”.

“He has to do a deal without them,” he tweeted.

It is understood Mr Sunak’s officials held talks with their Brussels counterparts on Sunday on how to give local politicians a greater say in the application of EU law in the region, addressing what unionists call the “democratic deficit”.

While it is thought the EU and UK are close to signing off a deal that would reduce protocol red tape on the movement of goods from Great Britain to Northern Ireland, there is no expectation that Brussels is willing to agree to end the application of EU law in the region.

The EU contends that a fundamental part of the protocol – namely that Northern Ireland traders can sell freely into the European single market – is dependent on the operation of EU rules in the region.

What is the Brexit deal being discussed between UK and EU?

The talks that are ongoing are about part of the existing Brexit deal that relates to Northern Ireland.

Dubbed the “Northern Ireland Protocol”, it was agreed with the EU by Boris Johnson in 2020 – alongside the wider trade and cooperation treaty.

The point of it is to avoid a hard physical border on the island of Ireland – the only place where there is a land frontier between the UK and EU.

All parties agreed this was necessary to preserve peace on the island, and the protocol does this by placing Northern Ireland in a far tighter relationship with the EU, compared with the rest of the UK (because the Republic of Ireland is in the EU).

This led to goods travelling into Northern Ireland from the rest of the UK being subject to EU import checks – effectively turning the Irish Sea into a trade border, which former prime minister Boris Johnson promised would not happen.

Unionists say this puts Northern Ireland at an economic disadvantage while threatening its place in the UK – and are refusing to cooperate with forming a powersharing government as a result.

There’s also concern over a so-called “democratic deficit” whereby Northern Ireland takes on rules from Brussels that it has no say over.

The role played by the European Court of Justice is a big sticking point: Because Northern Ireland is still subject to EU rules, Brussels believes its court should have a heavy involvement in resolving disputes.

But the DUP and some Conservative MPs see this as an erosion of the UK’s sovereignty and incompatible with the aims of Brexit.

Downing Street has kept quiet about the details of what could be in the new deal – but it is expected to include measures that reduce red tape on goods travelling to Northern Ireland and the UK, as well as some sort of compromise on the role of the ECJ.

There may be a “green lane” and “red lane” system to separate goods destined for Northern Ireland from those at risk of being transported to the Republic and on to the EU, which should reduce the need for physical checks and paperwork.

There could potentially be a mechanism whereby the ECJ can only decide on a dispute after a referral from a separate arbitration panel or a Northern Irish court.

The big unknown is whether the DUP will support the deal. The party has come up with seven “tests” that it will apply to any deal when deciding whether to back it, including no checks on goods going from Great Britain to Northern Ireland and no border in the Irish Sea.

If they don’t back a deal and continue their protest at Stormont – then a government in Northern Ireland can’t be formed.

That’s because the DUP is one of two parties that shares power in the devolved government in Northern Ireland – an arrangement made under the Good Friday Agreement which ended decades of violence in Northern Ireland.

Because the DUP are boycotting the Northern Ireland Assembly, this has meant the democratic institutions that are supposed to be running public services in Northern Ireland and representing voters haven’t been functioning properly for more than a year.

Pressure on Mr Sunak is mounting after his predecessor-but-one made a weekend intervention calling for him to take a tougher line with the EU.

A source close to Mr Johnson said his view was that “it would be a great mistake to drop the Northern Ireland Protocol Bill” – which would empower the UK to scrap parts of the treaty without the EU’s permission.

A senior government official indicated that a successful outcome of the negotiations would mean the controversial legislation – tabled at Westminster under Mr Johnson’s leadership but paused when Mr Sunak entered No 10 – would no longer be needed.

Read More:
Cabinet minister says Boris Johnson intervention ‘not entirely unhelpful’
Northern Ireland Protocol Bill is ‘illegal and unrealistic’, EU envoy warns

But some Tories quickly sided with the former prime minister, with Conservative former cabinet minister Simon Clarke and Lord Frost – who negotiated Mr Johnson’s original Brexit deal – urging the government to push ahead with the protocol bill.

Cabinet minister Penny Mordaunt also said Mr Johnson’s warning was “not entirely unhelpful”, while Home Secretary Suella Braverman said on Monday that the legislation was “one of the biggest tools” at the government’s disposal for “solving” the issues in the Irish Sea.

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Boris Johnson is bitterly opposed to Rishi Sunak’s plans to abandon the NI Protocol Bill

Labour will vote with government on protocol

On Monday Sir Keir Starmer repeated that the opposition would back the government to get any deal through.

Speaking to reporters during a visit to Thurrock in Essex, the Labour leader said: “There is a window of opportunity to move forward…the question now is whether the prime minister is strong enough to get it through his own backbenches.

“What I have said on Northern Ireland, the national interest comes first. So we will put party politics to one side. We will vote with the government and so the prime minister doesn’t have to rely on his backbenches.”