12AUG

Welsh Labour collapses to nine seats

4 min read

14:07UTC

Welsh Labour finished with 9 Senedd seats on 7 May 2026, the smallest Welsh Labour group in any devolved chamber since 1910, after First Minister Eluned Morgan lost her Ceredigion Penfro seat on 6,495 votes.

← Back to Reform bleeds councillors, wins by-elections Jump to analysis ↓

PoliticsDeveloping

Key takeaway

Welsh Labour's 2024 closed-list PR system produced the 9-seat result its 12 percent vote share required.

Welsh Labour finished with 9 of 96 Senedd seats on Thursday 7 May 2026, polling 12 percent vote share. It is the smallest Welsh Labour group in any devolved chamber and the worst Labour result in Wales by any measure since 1910. Eluned Morgan, the First Minister, lost her Ceredigion Penfro constituency on 6,495 votes, becoming the first sitting head of a UK government to lose her own seat in office. The party appointed Ken Skates interim leader within 24 hours.

The 9-seat result sits three seats below the YouGov final Senedd MRP, which projected Welsh Labour on 12 seats and 12 percent vote share. Three seats inside the modelling error band is a strikingly accurate projection by the standard of the same firm's English MRP, which missed Reform UK by 894 seats on the same night (event-00). The Welsh ballot used D'Hondt, the proportional formula that allocates seats by dividing each party's votes by successive divisors, on a closed-list system in which voters pick a party and seats go to candidates in the order the party listed them. PR systems remained projectable; FPTP did not.

D'Hondt at 12 percent vote share produces 9-to-12 seats out of 96, which is what arrived. There is no FPTP cushion to soften vote-share collapse for a previously dominant party under closed-list PR. The Senedd was expanded from 60 to 96 seats and the new closed-list system negotiated by Mark Drakeford's administration in 2024 on capacity and democratic-renewal grounds. Welsh Labour wrote the system, voted for the system, and absorbed the result the system arithmetically produced. The sole instrument that might have lifted the seat tally, an FPTP constituency tier, was deliberately removed in the same Reform.

Senedd turnout was 51.72 percent, the highest ever recorded for a Welsh devolved election. Higher participation under a more proportional ballot did not save Welsh Labour. Voters arrived in larger numbers and distributed their support more thinly across more parties. Morgan's successor as Welsh Labour leader, and the party's posture toward a Plaid Cymru minority government's confidence-and-supply requests (event-02), will define whether the 9-seat result is the floor of the collapse or its first stage.

Deep Analysis

In plain English

Wales has its own Parliament, called the Senedd. Until 2026 it used a voting system where you could vote for a local candidate as well as a party. Welsh Labour had been in government there since 1999, 27 years without a break. In 2026, Wales switched to a new voting system where you only vote for a party, not a person. Votes are then converted into seats using a formula called D'Hondt. At 12% of the vote, Labour only gets 9 seats out of 96. First Minister Eluned Morgan wasn't personally rescued by voters in her area because the new system doesn't work that way. She lost her seat along with Labour's majority.

Deep Analysis

Root Causes

Welsh Labour's structural collapse has three independent drivers, each of which would have been damaging alone.

First, the new D'Hondt closed-list system removed the incumbency advantage that had sustained Welsh Labour MSs in their personal votes for 27 years. Under the old mixed-member system, a popular local MS could survive a party collapse by converting personal votes into constituency wins. Under closed-list D'Hondt, the individual is invisible to the voter; only the party label matters.

Second, the Welsh Green Party's 8-seat collapse in the final polling fortnight, Green-to-Plaid tactical migration, concentrated the anti-Labour vote on a single challenger. Plaid at 43 seats needed a fragmented opposition; instead it got a unified one.

Third, Morgan's personal approval ratings were negative from the start of 2026 (The Spectator reported a net rating of minus 18 for Farage in the 28 April debate, but Morgan's own ratings among Welsh voters were also negative). A leader who cannot defend her own seat cannot retain swing voters in marginal constituencies.

What could happen next?

Consequence
Plaid Cymru forms its first-ever government with a thin confidence-and-supply arrangement; every budget vote requires negotiation with Welsh Labour's 9-seat rump or the sole Lib Dem, making sustained governance structurally fragile.
Immediate · 0.85
Risk
Welsh Labour's 9-seat rump is below the threshold for official opposition status in many procedural senses; the party faces an internal leadership crisis and possible merger discussions with UK Labour over devolved autonomy.
Short term · 0.65
Consequence
The first sitting First Minister in any UK devolved institution to lose their own seat sets a constitutional precedent for how governments handle the transition period between results and formal change of office.
Short term · 0.9

Source Landscape

This story draws on neutral-leaning sources

Primary parallel: Quebec in 1976 offers the closest structural match: the Quebec Liberal Party, which had governed continuously since 1960, fell to 34 seats of 110 (28%) in a single election as the Parti Québécois swept to majority government.

As in Wales 2026, the collapse followed a decade of gradual vote erosion, a charismatic nationalist leader (René Lévesque), and a governing party that had run out of distinctive ground. The PQ victory did not produce independence; it produced 27 years of on-again-off-again sovereignty debate that dominated Quebec politics without resolution.

Counter-parallel: In the 1979 UK general election, Welsh Labour retained 22 of 36 Welsh seats despite a catastrophic UK-wide result (Jim Callaghan's government fell). Wales remained a Labour fortress even as England swung to Thatcher. The 1979 counter-case shows Wales and England can move independently. The 2026 result inverts that pattern: Wales and England moved together, both against Labour, but via different electoral mechanisms.

Welsh Labour's budget commitments, a £4bn NHS investment programme, £2 bus fares, 100,000 new homes, now fall to a Plaid Cymru minority government that inherits the same Barnett formula funding envelope and the same public-sector pay pressures.

The Welsh budget for 2026/27 was set by Morgan's government; Plaid cannot revise it without a full emergency budget. The immediate fiscal consequence is that Plaid must either honour Labour's spending commitments (risking their own programme) or break them (inheriting Labour's reputation for broken promises).

Consensus view: Roger Scully (Wales Governance Centre, Cardiff University) has long assessed that Welsh Labour's dominance was built on a mixed-member electoral system that gave the party a FPTP constituency floor even in bad years.

The switch to closed-list D'Hondt eliminated that floor: at 12% vote share, the mathematics of D'Hondt allocate 9 of 96 seats regardless of candidate identity, geography, or incumbency. Morgan's loss was therefore not an individual failing, she would have needed to be on the first or second place of the party list in a constituency where Labour hit 33%.

Counter-view: Richard Wyn Jones (Wales Governance Centre) has argued in prior research that Welsh Labour's structural decline predates any electoral-system change; the 2026 collapse accelerated a trend already evident in the 2021 Senedd and 2024 Westminster results, where Welsh Labour's vote share fell 12 points from 2019. On this reading, the D'Hondt system made the collapse visible, but the vote had already left.

Key tension: Whether Welsh Labour's 12% vote share represents a floor the party can rebuild from, or a structural realignment in which Plaid Cymru has permanently absorbed the Welsh centre-left.

First Reported In

Update #7 · Reform's 14 councils, 894 seats short

Wikipedia (citing BBC Wales and ITV Cymru Wales results)· 9 May 2026

Read original →

Causes and effects

Caused by

Welsh Labour at 12%, lowest since 1906

YouGov's final Senedd MRP projecting Welsh Labour at 12% and 12 seats foreshadowed the 9-seat actual result

Occurred 28 Apr 2026

Read story →

This Event

Welsh Labour collapses to nine seats

Twenty-seven years of continuous Welsh Labour government ended in a single count, with the sitting head of a UK government becoming the first to lose her own constituency in office. The closed-list D'Hondt arithmetic that produced the result is the system Welsh Labour itself wrote and voted into law in the 2024 Senedd reform package.

Led to

Plaid takes Cardiff after 27 years

Welsh Labour's collapse to 9 seats directly enabled Plaid to form a minority government and elect ap Iorwerth First Minister.

Occurred 12 May 2026

Read story →

Welsh Labour: fourth leader in 26 months

Morgan's seat loss on 7 May triggered her resignation and the succession of Skates as interim leader on 8-9 May.

Occurred 9 May 2026

Read story →

Different Perspectives

Rhun ap Iorwerth / Welsh Government (Plaid Cymru)

Ap Iorwerth presented six priorities to the Senedd on 22 September without numeric targets or a named partner party, promising to work across the chamber where there is common ground. He says his government will be judged on results.

Michael Marra / Scottish Labour

Marra won the leadership on 19 September, and three days later his 17 MSPs backed Swinney's right-to-decide motion once their child-poverty amendment was written in. He says Scottish Labour's task is to tell voters what it stands for.

Andy Burnham / Labour Party

Burnham told conference in Liverpool on 29 September that Labour's next manifesto will commit to changing the electoral system, and invited every party into a National Commission on Electoral Reform. He has not named a replacement system, and no chair or remit has been published.

Conservative Party (frontbench peers and Kemi Badenoch)

Conservative frontbench peers argued against retrospective rules at the Lords Second Reading on 14 September, a position that protects gifts made before any cap. Kemi Badenoch rejected Burnham's electoral reform commission on 2 October, accusing him of using it to entrench the left.

Reform UK

Reform denied wrongdoing after the Channel 4 News programme, called the sting a hoax by climate activists and said it would cooperate with the Metropolitan Police. In the same month it announced £36m gifts from Ben Delo and Christopher Harborne.

Steff Aquarone / Liberal Democrats (North Norfolk)

Aquarone told Rayner in the Commons on 7 September that North Norfolk District Council had spent money preparing for a reorganisation the Government has now withdrawn. He puts the cost of the cancelled merger on districts in the four areas.