Tuesday briefing: How to understand Wales, Scotland and Northern Ireland’s joint call for change

by | Sep 15, 2026 | Top Stories

Tuesday briefing: How to understand Wales, Scotland and Northern Ireland’s joint call for change

Three centre-left nationalist parties that govern Scotland, Wales, and Northern Ireland convened this week to formalize a coordinated political position. The Scottish National Party, Plaid Cymru, and Sinn Féin, along with Irish opposition leader Mary Lou McDonald, signed a memorandum of understanding asserting their countries’ right to pursue independence. The agreement called on Westminster to “prepare, plan and facilitate constitutional change” and stated that no UK government has the right to block a referendum should the public demand one.

This development represents a significant shift in British politics, as these parties have simultaneously held governing positions since May for the first time. While each jurisdiction operates on different timelines and faces distinct domestic pressures regarding independence referendums, the leaders used the Cardiff meeting to present a unified stance. Scottish National Party leader John Swinney and Sinn Féin vice-president Michelle O’Neill called for immediate referendums in their respective regions, while Plaid Cymru leader Rhun ap Iorwerth declined to specify a timeframe for Wales.

The gathering gained additional prominence from recent statements by national leaders on constitutional matters. Prime Minister Andy Burnham has made conflicting pronouncements, first stating that a Northern Irish reunification referendum was “off the table” before later suggesting a Scottish independence referendum could occur if “clear consensus” emerged, though he subsequently retracted that position. Meanwhile, Donald Trump told reporters during a visit to Ireland that he would support a united Ireland, prompting reactions from unionists and Westminster officials.

In Wales specifically, Plaid Cymru recently ended a century of Labour dominance in the Senedd following elections in May. Current polling indicates 32 percent support for Welsh independence, with ap Iorwerth signaling he will not pursue a referendum during the current term. The party is prioritizing domestic issues including economic development and positioning Wales as an independent nation capable of self-determination. Both Wales and Scotland face challenges from Reform representation in their legislatures, though nationalist parties benefited electorally from opposition to right-wing populism.

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