On 7 May 2026 Plaid Cymru won 43 of the 96 seats in the Welsh Senedd, its best result and the largest for any Welsh nationalist party. Reform UK won 34 to become the second party and official opposition, its first significant presence in Wales. Welsh Labour, which had led every Welsh government since devolution began in 1999, fell to nine seats; its leader and First Minister, Eluned Morgan, lost her own constituency, the first serving Welsh First Minister to do so, and resigned. On 12 May Rhun ap Iorwerth was elected First Minister with the votes of Plaid's members and the two Greens, and formed a minority government six seats short of a majority. A party founded in 1925 to campaign for Welsh independence now runs Wales.

The result was as much about the system as the votes. This was the first Senedd election under an enlarged parliament of 96 members, elected by proportional representation in sixteen six-member constituencies. Under first past the post Plaid had never won more than about seventeen seats; under the new system it won 43, while Labour's century-old dominance, built on concentrated votes in the valleys and cities, translated into just nine seats once seats followed vote share.

The breakthrough came with independence set aside. A year before the election, in May 2025, ap Iorwerth said there would be no referendum in a first Plaid term and no talk of one before 2030. The campaign was fought on the Welsh NHS, housing, childcare and a proposed weekly child payment, and on Labour's record after nearly three decades in power; independence was in the manifesto but not on the platform. That deferral is now the party's governing bargain.

Government also inherits the record Plaid ran against. Wales has among the longest NHS waiting times of the UK nations, with a higher share of its population waiting for treatment than in England or Scotland, and every A&E delay and cancelled operation is now ap Iorwerth's to answer for rather than Labour's. In his first speech as First Minister he promised the government would "work relentlessly to cut NHS waiting lists ... so people get faster care," and his pledge that urgent medical needs be seen within 48 hours will be an early measure of whether it does. The manifesto's fair-funding demands, the £4 billion HS2 Barnett consequential Wales says it was denied and devolution of the Crown Estate on the Scottish model, now fall to a Plaid government negotiating with a Labour one in London rather than to an opposition campaigning against it. Its central welfare ask, scrapping the two-child benefit cap, had already been met by Labour's November 2025 Budget.

The 34 Reform seats are what makes the new Senedd different. Under the old system Reform would have won nothing; under proportional representation it is the opposition, pressing the same anti-immigration, anti-establishment case that has reshaped politics in England. Welsh politics, for a generation effectively a Labour monopoly with Plaid in the wings, is now a genuine three-way contest.

The comparison with Scotland is instructive: the SNP won the most Holyrood seats in May 2026 and still fell short of the majority it had set as its condition for pursuing independence, while Plaid won fewer seats and formed a government by leaving the constitutional question out of the campaign. The price was the cause Plaid was founded on. Ap Iorwerth has set 2030 as the point to return to it; the first term will show whether a party that won by governing can still make independence its argument, or whether that route has been closed by its own success.