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

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

Introduction

The United Kingdom’s constitutional equilibrium is being tested once again. In early May, the leaders of Plaid Cymru, the Scottish National Party (SNP) and Sinn Féin signed a historic agreement that calls for a substantial transfer of powers from Westminster to the three devolved nations. The move follows months of political turbulence, a bruising general election and a growing sense that the existing devolution settlements no longer reflect the aspirations of Wales, Scotland and Northern Ireland. This briefing unpacks what happened, why it matters and what the next steps could look like for the future of the Union.

What Happened

On 7 May, as the UK was still absorbing the shock of a surprise general election result, the three nationalist parties announced a joint declaration of intent. The document, signed in Cardiff, pledged to work together on a coordinated campaign for greater fiscal, legislative and policy autonomy. By aligning their strategies, the parties aim to present a united front in negotiations with the UK government, increasing pressure on Prime Minister Keir Starmer to entertain a more federal arrangement.

The agreement was quickly followed by a series of joint statements and a coordinated media push. Each party highlighted specific reforms – from a Scottish‑wide income‑tax power to a Welsh‑controlled health budget and a Northern‑Irish assembly with enhanced cross‑border competencies. While the declaration stops short of demanding outright independence, it marks the first time the three governments have formally linked their constitutional ambitions.

Key Details

The joint plan centres on three core demands. First, a “reserved‑powers” review that would shift a set of fiscal levers – notably income tax, corporation tax and borrowing capacity – to the devolved administrations. Second, a guarantee of “equal funding” that would replace the current Barnett‑type formula with a needs‑based allocation model, addressing long‑standing grievances about perceived under‑investment in Wales and Northern Ireland. Third, a commitment to a “shared‑future dialogue” that would establish a permanent inter‑governmental forum, giving the three nations a seat at the table on UK‑wide policy areas such as defence, foreign affairs and climate strategy.

To operationalise these goals, the parties have set up a joint task‑force comprising senior ministers from each administration. The task‑force will produce a detailed policy paper by the end of September, outlining the legal and financial implications of the proposed powers transfer. In parallel, they have launched a public‑engagement campaign, seeking input from citizens, businesses and civil‑society groups across the three nations.

Background

Devolution in the UK began in the late 1990s, with the Scotland Act, Government of Wales Act and Northern Ireland Act each creating separate legislatures and executive bodies. Over the past two decades, the powers granted have expanded incrementally, but many observers argue that the settlements remain asymmetrical and outdated. The SNP’s 2014 independence referendum, the 2016 Brexit vote – in which Scotland and Northern Ireland voted to remain in the EU – and the 2022 “Windsor Framework” for Northern Ireland have all intensified calls for a more robust, federal‑style union.

The political context of May 2024 added urgency. Labour’s narrow victory under Keir Starmer was accompanied by a fragmented opposition and a fragile parliamentary majority. Economic pressures, rising energy costs and lingering post‑Brexit trade issues have amplified regional disparities, making the demand for locally tailored solutions more compelling than ever.

Why It Matters

First, the joint call reshapes the power dynamics within the United Kingdom. By presenting a coordinated front, Wales, Scotland and Northern Ireland can leverage collective bargaining power that far exceeds the influence each would have individually. This could force Westminster to reconsider the centralised model that has dominated British politics since the 1970s and move toward a more federal arrangement, potentially redefining the very nature of the Union.

Second, the agreement has tangible implications for citizens. Greater fiscal autonomy could allow each nation to tailor tax policy, public‑service funding and economic development strategies to local needs, potentially delivering more efficient services and addressing long‑standing grievances about under‑investment. Moreover, a transparent inter‑governmental forum would give regional voices a formal role in decisions on defence, climate policy and foreign affairs, areas traditionally reserved for Westminster.

What Happens Next

The immediate task for the joint task‑force is to produce a comprehensive white paper that outlines the legal steps required to transfer powers, the financial arrangements needed to sustain them, and the timeline for implementation. This document will be submitted to the UK Treasury and the Department for Levelling Up, Housing and Communities for review. Simultaneously, the three parties will begin a series of regional town‑hall meetings to build public support and refine the proposals based on feedback.

On the Westminster side, the Starmer government faces a strategic decision: engage in good‑faith negotiations that could lead to a negotiated settlement, or risk a constitutional standoff that might fuel separatist sentiment. Early indications suggest the government is willing to discuss a limited powers transfer, but it remains cautious about setting a precedent that could encourage further fragmentation. The next few months will therefore be a test of political will on both sides, with the potential to reshape the UK’s constitutional architecture.

Conclusion

The joint declaration by Plaid Cymru, the SNP and Sinn Féin marks a watershed moment in British politics. By uniting around a shared vision of greater autonomy, the three devolved nations have amplified their collective voice and placed the question of the Union’s future squarely on Westminster’s agenda. Whether this leads to a negotiated federal settlement, a piecemeal powers‑transfer, or a more contentious constitutional showdown will depend on the willingness of both the UK government and the regional parties to compromise. What is clear, however, is that the call for change is no longer a peripheral issue – it is now a central, and increasingly urgent, component of the United Kingdom’s political discourse.