Here is what the page “Plaid Cymru, SNP, and Sinn Féin Unite in Historic Push for UK Constitutional Reform: What ” contains. In a landmark moment for British politics, leaders Rhun ap Iorwerth of Plaid Cymru, John Swinney of the SNP, and Michelle O’Neill of Sinn Féin have signed... The Guardian WorldSep 15, 2026 • 5:45 AM1 views In a landmark moment for British politics, leaders Rhun ap Iorwerth of Plaid Cymru, John Swinney of the SNP, and Michelle O’Neill of Sinn Féin have signed a memorandum of understanding calling for constitutional change across Wales, Scotland, and Northern Ireland.
The agreement, formalized in Cardiff, marks the first time that centre-left nationalist parties—each with aspirations for independence—have simultaneously held power in all three nations since the May 2024 general election. Their joint demand urges Westminster to ‘prepare, plan and facilitate’ devolution or independence referendums, highlighting growing frustration with London’s central control. This listing links straight to the original page, where the content is available in full.