Full Breakdown
Nationalist Parties Sign Memorandum in Cardiff Calling for Constitutional Change
By Drooid · · How we work
Core Event
On a Monday morning in Cardiff, leaders of the Scottish National Party (SNP), Plaid Cymru, and Sinn Féin met with Sinn Féin president Mary Lou McDonald to sign a memorandum of understanding (MoU). The signatories – SNP leader John Swinney, Plaid Cymru leader Rhun ap Iorwerth, Sinn Féin vice-president Michelle O’Neill, and McDonald – framed the agreement as a partnership to advance independence movements across the three nations.
Background and Context
The MoU follows heightened nationalist activity after the United Kingdom’s departure from the European Union. Brexit-related economic concerns and the 2016 EU referendum, in which Scotland voted to remain, have revived calls for self-determination. This is the first formal coordination among parties leading governments in Scotland, Wales and Northern Ireland on independence goals.
Key Figures
- John Swinney – SNP leader and First Minister of Scotland.
- Rhun ap Iorwerth – Plaid Cymru leader and First Minister of Wales.
- Michelle O’Neill – Sinn Féin vice-president and First Minister of Northern Ireland.
- Mary Lou McDonald – Sinn Féin president.
Objectives and Policy Proposals
The MoU outlines three policy areas for cooperation:
1. Economic Reform – Sharing ideas to build “productive, prosperous economies” that create jobs, tackle inequality and distribute wealth more fairly, rejecting “Whitehall’s broken economic model.”
2. Energy Collaboration – Expanding renewable energy to lower household and business bills, arguing that the “energy wealth of our nations” should serve local needs.
3. European Integration – Stating that each nation’s future belongs in the EU and calling for stronger European relationships to enhance trade, investment, culture and cooperation.
The document reaffirms each nation’s “right to self-determination” and asserts that no Westminster government can block democratic decisions about constitutional futures.
Official Statements & Responses
- John Swinney insisted a Scottish independence referendum must be held within five years, citing parliamentary support and favourable public-opinion trends.
- Michelle O’Neill linked the MoU to recent comments by U.S. President Donald Trump, noting his support for Irish unity.
- The UK Prime Minister’s office said the government remains focused on easing the cost-of-living crisis and delivering economic security, emphasizing that the United Kingdom is strongest when its nations work together around shared values.
Potential Implications
The MoU formalises a coordinated nationalist front that could increase pressure on the UK government to consider referendums. Joint economic and energy strategies aim to demonstrate viable alternatives to the Westminster-centred model, while the shared commitment to EU membership may influence future trade and diplomatic negotiations.
What’s Next
The memorandum calls on the British government to develop a plan for constitutional change in each jurisdiction, but no timetable has been announced. The parties will identify “practical areas” for cooperation, establishing joint working groups on economy, energy and European affairs. Future developments will depend on the UK government’s response to the request for a structured roadmap toward potential referendums.