The Day Westminster’s Era Was Declared Over: Three Cracks That Could Break Britain

Three Cracks, Connected

I

In the meeting room at Cardiff Bay there was a long table. A dark blue tablecloth. Four chairs, one on each side. Outside, the Welsh Government building was a wall of glass. September sun hit it and threw back a glare.

The signing pens were ordinary black ballpoints, placed in front of each seat. John Swinney signed first. The sound of the nib on paper was light. Rhun ap Iorwerth paused before signing. He wanted to make sure the line he was signing said “Leader of Plaid Cymru,” not “First Minister of Wales.” Michelle O’Neill signed fastest, but after she put the pen down she pressed her fingers on the paper, as if checking whether the ink had dried. Mary Lou McDonald signed last. She capped the pen and laid it beside the document.

The document in front of them was two pages. The first page said: “For the people on these islands, and for the world watching, there could be no clearer signal: the era of Westminster is coming to an end.” The second page said: “Each nation will decide its own future, in its own way and on its own timetable.”

O’Neill’s pause had an institutional reason. The Northern Ireland Executive is a power-sharing body. She could not sign as First Minister representing the whole executive on a unity agenda. Deputy First Minister Emma Little-Pengelly was not in Cardiff that day. In Belfast she said one sentence: “The office of First Minister is being used as a tool.”

The signed paper stayed on the table. Beside it were four empty coffee cups. A staff member came in to collect the cups, glanced at the document, and did not touch it.

II

In 1999, the year the Scottish Parliament was restored, MSPs in Edinburgh were handed a list of powers. The list included tax-varying powers, education, health, justice, local government. In Cardiff that same year, members of the Welsh Assembly were handed a different list. The powers on it were “negotiable.” Each one needed London to nod first.

The Scottish Parliament could legislate directly on more than a hundred matters. The Welsh Assembly could initially legislate directly on fewer than twenty. The Northern Ireland Assembly was different again: its powers came from the Belfast Agreement, and the Agreement spoke of “power-sharing,” not “devolution.”

In 1999 this looked like a technical question of institutional design. Twenty-seven years later, it had become three separate legal battlefields.

III

On a bookshelf in John Swinney’s office there is a ruling. It sits on the second shelf. The ruling was issued in November 2022 by the UK Supreme Court. It runs to forty-seven pages. Paragraph 47 says one thing: the Scottish Parliament has no power to legislate on “the Union of Scotland and England” as a constitutional matter.

Next to the ruling is a white paper. Its cover is the official document of the 2014 independence referendum. That year, Scots chose to remain in the United Kingdom by 55 percent to 45 percent. Page 3 of the white paper says: “a once in a generation decision should be respected.”

Swinney has left no gap between the two documents. They sit right next to each other.

For a second independence referendum, Scotland needs authorization from London. The 2022 ruling turned a political convention into legal text. London can authorize or refuse. No time limit or conditions apply.

IV

On the Northern Ireland Secretary’s desk there are usually two documents. One is a copy of the 1998 Belfast Agreement. Article 1 says: if the Secretary of State judges that “a majority would likely support” Irish unity, then he has a duty to call a border poll.

The other is an internal memo. It is usually one page. It contains recent polling data and a standard closing line: “No clear evidence of a shift in public opinion at present.”

Between the two documents sits a coffee cup. It is sometimes full, sometimes empty. The Secretary of State can decide when to look at the first document and when to look at the second. He holds both the power to call a poll and the standard for “clear evidence.” The Agreement does not require him to publish the basis for his judgment. It does not set a deadline for his decision.

V

At the Cardiff press conference, Rhun ap Iorwerth was asked about a timetable. He said: “The timetable will be set by the people of Wales, after they have been persuaded. My job is to persuade them.”

What he did not say was this: the Welsh Parliament does not even have the power to set a timetable. Wales has never had any statutory mechanism for an independence referendum or a referendum on its constitutional status. Scotland held one in 2014, authorized by London. Northern Ireland has a border poll mechanism in the Belfast Agreement, never triggered. Wales has nothing.

His government plans to establish a “national commission” to “lay the foundations” for planning Wales’s independent future. The commission’s first task is to secure the devolution of the referendum power itself. A UK Parliament research paper notes that this would require amending the Government of Wales Act or completing a transfer of powers agreed between London and Cardiff.

On that list of powers, the column for a referendum is blank.

VI

In August 2026, YesCymru commissioned a poll from Survation. The report contained one number: 54 percent of Welsh people placed themselves at “5 or above” on a scale from 0 to 10. Zero meant strongly opposed to independence. Ten meant strongly supportive.

That number is not called “support for independence.” The report labels it “open to independence.” More than half of Welsh people do not rule out the possibility.

Among young people in Wales, support for independence is 72 percent. YesCymru chair Robert Hughes looked at that number and said one sentence: “That is why we believe an independence majority is achievable.”

In Scotland, support for independence has long fluctuated between 45 and 50 percent. In Northern Ireland, support for unity in a May 2026 survey was 35.8 percent, down nearly five points from 40.6 percent in 2025. In none of the three nations has support crossed the halfway line.

But Hughes is not looking at the support figure. He is looking at that 54.

VII

During a visit to Ireland, Donald Trump said: “There’s Northern Ireland, and there’s Ireland. To me, putting them together seems the most natural thing in the world.”

In a Dublin pub, the television was showing the news. An old man raised his glass and touched it toward the screen. He said nothing. He drank. Someone beside him asked what he thought. He shook his head and said: “What the Americans say doesn’t matter. What matters is what they think in Belfast.”

The leader of the Democratic Unionist Party called Trump’s remarks “the destruction of our country.” Reform UK leader Nigel Farage said “Northern Ireland is a proud and indivisible part of the United Kingdom.” But the words were already out. They became a clink of glass in a Dublin pub, a headline in London papers, a briefing in a Belfast office.

Meanwhile, UK-US relations are at their lowest point since the end of the Second World War. The UK refused to join US military action against Iran. It stood with Denmark on Greenland. The US threatened to review the sovereignty of the Falklands. A UK pressed from abroad has no spare strength for a constitutional crisis at home.

VIII

In the memorandum, the three parties wrote one line: “The future of our nations belongs in the European Union.”

In 2016, Scotland voted 62 percent to 38 percent to remain in the EU, but the UK as a whole voted 52 percent to 48 percent to leave. Scots see themselves as having been taken out against their will. That memory is one reason behind the SNP’s push for a second independence referendum.

Wales voted to leave in 2016, but Plaid Cymru now says “return to Europe.” Northern Ireland’s position is the most unusual. It is the only part of the UK with a land border with an EU member state, Ireland. The border mechanism in the Belfast Agreement was discussed, amended, and discussed again during the Brexit talks.

Brussels has not publicly backed a break-up of the UK. But an EU that is open to an independent Scotland, an independent Wales, and a united Ireland “returning to Europe” provides external legitimacy. That legitimacy does not need a declaration. It only needs no refusal.

IX

After the Cardiff meeting, the four walked out of the building. It was raining lightly. Swinney opened a black umbrella. Rhun ap Iorwerth had no umbrella. He stood under the edge of Swinney’s umbrella, said a few words, and walked back to his car. O’Neill glanced back at the building before getting in. Rain fell on her coat. McDonald was already in her car, the window closed.

After the cars left, the table in the meeting room was cleared. The tablecloth was changed to light grey. A staff member put the signed paper into a folder. The folder went into a filing cabinet. On the cabinet was a label with the date and four words: “Memorandum of Understanding.”

The document says: “the era of Westminster is coming to an end.” That afternoon, Westminster made no response. The Prime Minister’s spokesperson said Andy Burnham “does not support independence referendums in the three nations.” The spokesperson did not say “never,” and did not say “will consider legal routes.”

The 2022 UK Supreme Court ruling says: the survival of the Union depends on the consent of the people. What the ruling does not say is this: when people in three nations begin to question that consent at the same time, how long can London refuse?

The filing cabinet door closed. The rain kept falling.