Leaders of Scotland, Wales, and Northern Ireland meet to discuss constitutional future

On September 14, 2026, the leaders of the three devolved nations of the United Kingdom—John Swinney of the Scottish National Party (SNP), Rhun ap Iorwerth of Plaid Cymru, and Michelle O'Neill of Sinn Féin—are gathering in Cardiff. Along with Sinn Féin President Mary Lou McDonald, they are expected to sign a memorandum of understanding, acting in their capacity as party leaders to advocate for the right to self-determination and the potential for independence referendums. This is the first time all three nations are governed by parties that support leaving the United Kingdom.

The meeting follows recent comments from British Prime Minister Andy Burnham, who suggested that a new Scottish independence referendum could be considered if there is a "clear consensus." The session is also heavily influenced by recent remarks from U.S. President Donald Trump, who, during his visit to Dublin on September 12, expressed strong support for a united Ireland. While the Cardiff meeting aims to strengthen cooperation on constitutional change, it reflects a broader shift in the political landscape, as previous UK governments had consistently opposed such secessionist efforts. The outcome of this meeting marks a significant escalation in discussions regarding the future structure of the United Kingdom.