Key Takeaways
- Plaid Cymru won the Welsh Senedd election with 43 seats, ending a century of Labour rule in Wales.
- Reform UK surged to second place with 34 seats, pushing Labour to a distant third (9 seats).
- No party achieved the 49‑seat majority required under the new proportional system; Plaid can form a minority government and will seek cooperation with like‑mind‑ed parties.
- Rhun ap Iorwerth, Plaid’s leader, positioned himself as the prospective First Minister, framing the victory as a mandate for hope, credibility, and progress.
- Eluned Morgan, Welsh Labour leader, lost her Senedd seat – the first time a UK government leader has been defeated while in office – and announced her resignation, urging UK Labour to reassess its direction.
- The election highlighted voter concerns: “stop Reform” was the top motivator (14%), followed by immigration (10%).
- Turnout is expected to exceed 50%, reflecting heightened engagement in a historically Labour‑dominant region.
- The result means all three UK Celtic nations (Wales, Scotland, and Northern Ireland) are now governed by parties with separatist or independence‑leaning platforms.
Historic Shift Ends Labour’s Century‑Long Reign
Plaid Cymru’s victory in the 2024 Welsh Senedd election marks a watershed moment for Welsh politics. Securing 43 seats, the centre‑left nationalist party eclipsed Welsh Labour, which had governed Wales continuously since devolution began in 1999. This outcome ends over a hundred years of Labour dominance in the principality, a period that saw the party embed itself as the default governing force in Cardiff Bay. The result not only reshapes the balance of power in Wales but also signals a broader realignment across the UK’s Celtic fringe, where separatist‑leaning parties now hold sway in all three nations.
Plaid Cymru’s Path to Government
Rhun ap Iorwerth, Plaid Cymru’s leader, declared himself ready to become First Minister and to lead the next Welsh government. Although Plaid fell short of the 49‑seat threshold required for an outright majority under the new D’Hondt‑based proportional system, the party’s seat total comfortably allows it to form a minority administration. Ap Iorwerth emphasized that he would urgently engage with other parties sharing Plaid’s vision of a fair, compassionate Wales, seeking confidence‑and‑supply arrangements or informal coalitions to secure stability.
Reform UK’s Surge and Labour’s Collapse
Reform UK emerged as the official opposition with 34 seats, a dramatic increase from its 1% vote share in 2021. The party’s rise pushed Labour into a distant third place with only nine seats – its worst performance in Welsh electoral history. The surge reflects voter frustration with the status quo and a desire for change, even as many parties have ruled out any formal coalition with Reform due to ideological differences. Nonetheless, Reform’s showing underscores its growing influence on Welsh politics.
Labour Leader’s Personal Defeat
Eluned Morgan, who had taken over the Welsh Labour leadership in 2024, lost her own Senedd seat in Llandysul, becoming the first leader of a UK government to be defeated while still in office. In her concession speech, Morgan accepted full responsibility for the defeat, described Labour’s prospects as “catastrophic,” and called for a period of introspection and rebuilding. She urged the UK Labour leadership to “change course,” arguing that the Welsh electorate’s message was not about Keir Starmer’s personal leadership but about a broader rejection of Welsh Labour’s performance.
Underlying Causes of Labour’s Decline
Analysts attribute Labour’s downfall to years of erosion in public‑service quality, which has lagged behind the other UK nations on metrics such as health, education, and transport. While the rebranding of “Welsh Labour” after devolution initially succeeded in distinguishing the party from its UK counterpart and cementing devolution as the norm, growing dissatisfaction with service delivery weakened that advantage. The 2024 UK general election victory for Keir Starmer removed Labour’s ability to blame a Conservative‑led Westminster government for Welsh shortcomings, exposing internal shortcomings to voters.
Electoral System and Voter Motivations
The election was conducted under Wales’s new, more proportional voting system, which created 16 super‑constituencies each returning six members via the D’Hondt method. This system made predicting outcomes notoriously difficult, with the final seat in some constituencies decided by just a few dozen votes. Despite the proportional design, campaign messaging framed the contest as a two‑horse race between Plaid Cymru and Reform UK. According to the final YouGov poll, “stop Reform” was the single biggest factor influencing voters (14%), followed closely by concerns over immigration (10%). These motivations helped Plaid secure a plurality while keeping Reform from translating its vote share into governmental power.
Turnout and Political Engagement
Preliminary indicators suggest that voter turnout will exceed 50% for the first time in a Senedd election, a significant increase from previous contests. This heightened participation reflects the electorate’s recognition of the election’s historic stakes and the desire to influence a potential shift in Wales’s constitutional future. The surge in turnout also underscores the end of Labour’s reliable heartland, as traditionally safe seats became competitive battlegrounds.
Implications for Welsh Independence and the Celtic Nations
Plaid Cymru’s strengthened position reinvigorates the debate over Welsh independence. While the party stopped short of announcing an immediate referendum, its leader noted that the election result makes a future independence vote a “future possibility.” Coupled with the Scottish National Party’s governance in Scotland and Sinn Féin’s influence in Northern Ireland, the outcome means that all three UK Celtic nations are now led by parties with separatist or independence‑leaning agendas, potentially altering the dynamics of the Union.
Looking Ahead: Coalition Talks and Policy Direction
With no overall majority, Plaid Cymru will now enter negotiations with other parties to secure the confidence needed to govern. Ap Iorwerth indicated that discussions will focus on shared goals such as social justice, environmental sustainability, and economic resilience. The party’s platform emphasizes investing in public services, advancing renewable energy, and fostering a distinct Welsh identity within the UK framework. How these talks unfold will determine whether Wales experiences a stable minority government or faces further electoral uncertainty in the near term.