On 7 May 2026, Plaid Cymru won 43 of 96 seats in the Welsh Senedd, the largest result for any Welsh nationalist party in history. Labour collapsed to nine seats and lost government in Wales for the first time since devolution began in 1999. Eluned Morgan, the sitting First Minister, failed to win a seat in her own constituency. She resigned as Welsh Labour leader. Ken Skates was declared interim leader of what remained. Reform UK won 34 seats to become the official opposition, its first significant representation in Wales. The Conservatives won seven. The Greens won two, their first ever seats in the Senedd. The Liberal Democrats won one. On 12 May, the seventh Senedd met. Rhun ap Iorwerth was elected First Minister with the votes of Plaid Cymru and the Greens. Labour and the Liberal Democrats abstained. Ap Iorwerth formed a minority government, six seats short of a majority, and appointed his cabinet the following day. The party that has campaigned for Welsh independence since 1925 now governs Wales.
The result was made possible by the new electoral system. The Senedd expanded from 60 seats to 96, elected through 16 multi member constituencies each returning six members by proportional representation. Under the old first past the post system, Plaid had never won more than 17 seats. Under proportional representation, it won 43. Labour, which had dominated Welsh politics for a century through concentrated vote in the valleys and cities, was punished by a system that distributed seats in proportion to votes. Nine seats from what had been 30 is not a bad election. It is an extinction event.
The deferral of independence was deliberate. In May 2025, 12 months before the election, ap Iorwerth stated there would be no plan for an independence referendum in the first term and no referendum talk before 2030. The party that has defined itself through constitutional ambition removed the constitutional question from the campaign and won the biggest breakthrough in its history. Plaid won by not talking about independence. It talked about the NHS. It talked about housing. It talked about the Cynnal payment, a proposed weekly direct child benefit for families. It talked about childcare, pledging 20 hours a week for 48 weeks a year for all children aged nine months to four years. It talked about Labour's failure to deliver after 27 years in power. Independence was in the manifesto. It was not in the campaign.
On fair funding the manifesto demanded recovery of the £4 billion HS2 Barnett consequential Wales had been denied. The argument was that HS2 was classified as an England and Wales project despite no track being laid in Wales, denying Wales the funding uplift that Scotland and Northern Ireland received. The ask now sits with the Plaid Welsh Government negotiating directly with the Labour UK Government. On the Crown Estate the manifesto demanded devolution on the Scottish model, with offshore wind revenues retained for Welsh investment rather than flowing to the UK Treasury. Plaid will now negotiate it as a government rather than campaign for it as an opposition. The leverage has changed from outsider pressure to insider negotiation.
Plaid inherits an NHS with the longest waiting times in Britain. The party won by criticising Labour's Welsh Government delivery across 27 years. Now Plaid owns the record. Every A&E wait, every cancelled operation, every recruitment shortfall is now ap Iorwerth's responsibility. The defining campaign criticism has become the governing obligation. Ap Iorwerth pledged that pressing medical needs would be seen within 48 hours. That commitment will be the first test.
The manifesto's central welfare demand was scrapping the two child benefit cap. Labour scrapped it at the November 2025 Budget. The headline welfare ask has been delivered by the UK Government, not by Plaid.
Reform UK's 34 seats are the factor that changes the dynamics of the seventh Senedd. Under the old system, Reform would have won nothing. Under proportional representation, they are the second largest party and the official opposition. Plaid governs from the left with Green support. Reform opposes from the right with 34 seats and the same anti immigration, anti establishment platform that has reshaped English politics. Welsh politics, which for 27 years operated as a Labour monologue with occasional Plaid interruptions, is now a three way contest in which the constitutional question competes with economic populism and identity politics for the first time.
This is not a party that broke its manifesto. Plaid Cymru did what the SNP could not: won an electoral mandate that gives the party executive power in its own country. The SNP won 57 seats at Holyrood and fell short of a majority. Plaid won 43 and formed a government. The price was deferral of the constitutional commitment that defined the party for a century. Ap Iorwerth has set a 2030 deadline for returning to the independence question. Whether Plaid Cymru returns to independence before 2030 or whether the conditions that produced May 2026, a party winning by governing rather than by demanding a constitutional revolution, make independence permanently unviable as a campaign platform is the question the first term will answer. Plaid is now the government. Governments are judged on delivery, not on constitutional ambition. That is the deal ap Iorwerth made, and the voters accepted it.