JNN 14th September 2026 , London  : The leaders of Scotland, Wales and Northern Ireland will gather on Monday to sign a deal designed to kick-start the break-up of the United Kingdom.

Scottish First Minister John Swinney of the SNP, Welsh First Minister Rhun ap Iorwerth of Plaid Cymru and Northern Ireland First Minister Michelle O’Neill of Sinn Féin are due to put pen to paper on a memorandum of understanding at the five-star St David’s Hotel overlooking Cardiff Bay.

They will be joined by Sinn Féin president Mary Lou McDonald, the leader of the opposition in the Irish parliament. For the first time since devolution, all three nations are led by pro-independence parties.

The meeting comes after Andy Burnham suggested to MPs that he would authorise another Scottish referendum if there were a “clear consensus” in favour of one

John Swinney, the SNP leader and Scottish First Minister, claimed Mr Burnham was “facing up to the idea that he will go down in history as the final prime minister of the United Kingdom”.

Labour’s rout in Wales at May’s elections means there are now pro-independence parties in power in all three devolved nations for the first time.

Plaid Cymru surged to become the largest party in the Cardiff Senedd, with Rhun ap Iowerth, its leader, taking over as the country’s First Minister.

Meanwhile, the SNP fortified its position as the dominant power in Scotland, despite losing six Holyrood seats as Reform and the Greens made gains.

Sinn Fein won the Stormont elections in 2022, though a walkout by the DUP meant that Michelle O’Neill had to wait until 2024 to become First Minister. Sinn Fein is widely expected to hold on to power when the nation votes again next year.

The three leaders, who will be joined by Mary Lou McDonald, Sinn Fein’s president and leader of the opposition in Ireland, will gather at the five-star St David’s Hotel, overlooking Cardiff Bay, to discuss working together on a fresh independence drive.

Status quo ‘not sustainable’

Mr Swinney said on Sunday: “For the first time ever, Scotland, Wales and Northern Ireland are led by pro-independence first ministers. There could be no clearer sign that the status quo is not sustainable – and that Westminster must prepare for a post-UK future.

A source close to Swinney criticised the Prime Minister’s handling of the issue, saying: “Burnham has not read his brief and doesn’t seem to know the basics of the UK Government’s position on the Union. If I was a Unionist I would be very worried.”

“The momentum behind serious constitutional change is undeniable. Andy Burnham must now be facing up to the idea that he will go down in history as the final prime minister of the United Kingdom.

“Tomorrow in Cardiff, I am looking forward to discussing a better future with partners from across these islands – and that only comes with the fresh start of independence.”

It is understood the three first ministers will use the summit to sign a joint declaration asserting their respective nations’ right to self-determination.

Sources told Our Correspondent the aim was to pile more pressure on Mr Burnham, following his statement at Prime Minister’s Questions on Wednesday that another Scottish independence referendum could be held if public opinion backed one.

The Prime Minister told the Commons that the trigger for a separation vote was “exactly the same situation in Scotland” as Northern Ireland.

Under the terms of the Good Friday Agreement, there is a potential pathway for an Irish reunification poll to be held. It states that a referendum should be staged if it “appears likely” that a majority of people in Northern Ireland would vote to leave the UK.

After the talks, where they will sign a memorandum of understanding committing their parties to cooperate, the first ministers will hold a press conference.

Their agreement will cover four areas – the economy, energy, Europe and international cooperation and self-determination.

All three parties will agree that their nations should be in the EU, Scotland and Wales as new members and Northern Ireland as part of the Republic of Ireland.
It is understood that the memorandum of understanding will also commit them to strengthening relations with European “neighbours” as they prepare for independence.

The part of the deal focusing on the economy will argue that the UK’s economic model is not working for the citizens of Scotland, Wales and Northern Ireland.
Plaid Cymru is expected to use the meeting to put pressure on Mr Burnham to hand the Welsh government further powers over tax and spending. It is demanding revenues from the Crown Estate, including the seabed on which offshore wind farms are built, which currently go to the Treasury

The party also wants Labour to replace the Barnett Formula with a more generous settlement and to devolve further areas such as policing and rail funding.

A Plaid Cymru source said there was “a strong case for practical political cooperation on areas including energy, the economy and our relationship with Europe, as well as on the wider political and constitutional questions facing our nations and on the right to self-determination”.

“Our parties have much to gain from working together, as partners and as equals, where we share common interests and where cooperation can improve the lives of the people we represent,” the source added.

Irish unity ‘not a distant aspiration’
A Sinn Fein source said the leaders would discuss “how each of our nations has the right to shape its own future through democratic means, guided by the will of its people”.

“The Good Friday Agreement gives us the democratic means to decide it, and now is the time to prepare seriously for that choice,” they said.
“Irish unity is not a distant aspiration. The work of building the new Ireland must begin now.”

In a letter to Mr Swinney, sent on Thursday, the Prime Minister insisted another Scottish independence referendum was “off limits” before the next general election.

He insisted there was “no consensus for an independence referendum in Scotland and nor is there a clear basis to suggest that a majority of people in Northern Ireland presently wish to separate from the United Kingdom”.

Mr Burnham wrote: “The 2024 manifesto on which Labour secured its parliamentary majority was unambiguous: ‘Labour does not support independence or another referendum.

“As I made clear to you personally when we met recently in Glasgow, independence and a referendum are off limits as it would take our focus away from growing the economy and helping families with the cost of living.”