Skip to content
Welcome, thoughtbot's Giant Robots listeners!Start here
Senedd
AI-generated illustration
OrganisationGB

Senedd

Welsh Parliament; expanded to 96 seats under closed-list PR; first non-Labour government formed May 2026.

Rhun ap Iorwerth presented his Programme for Government 2026-2030 to the Senedd on 22 September 2026, naming no partner party in a chamber where his Plaid Cymru holds 43 of 96 seats.

Last refreshed: 7 October 2026 · Appears in 1 active topic

Key Question

Will the Senedd's new PR system end single-party Welsh government permanently?

Timeline for Senedd

#18 22 Sept

Received the programme on 22 September

UK Local Elections 2026: Rhun ap Iorwerth sets six goals for Wales
#11 1 Jul
#9 19 May

Received ap Iorwerth's first priorities statement on 19 May

UK Local Elections 2026: ap Iorwerth's six-power Wales Bill ask
#8 12 May

Voted to elect ap Iorwerth as First Minister

UK Local Elections 2026: Plaid takes Cardiff after 27 years
View full timeline →

Background

The Senedd is Wales's devolved legislature. It passes laws and scrutinises the Welsh Government across devolved areas including health, education, local government, housing, transport and parts of the environment. It first met in 1999 under the Government of Wales Act 1998 and was known as the National Assembly for Wales until 2020.

Since 7 May 2026 it has had 96 Members, elected in 16 six-member constituencies by closed-list D'Hondt proportional representation. A majority needs 49 seats; Plaid Cymru governs as a minority on 43.

On 15 September 2026 Dan Thomas resigned as leader of Reform UK in Wales, and so as Leader of the Opposition, after Gwent Police arrested him. He was released on bail, has not been charged and denies wrongdoing; he remains an MS. Reform's 33 MSs elected Helen Jenner as their leader on 21 September by 17 votes to 15.

Key Issues
Welsh governance

The Senedd requires negotiated rule

On 7 May 2026 Wales elected 96 Members for the first time, across 16 six-member constituencies by closed-list proportional representation, replacing the 60-seat chamber. Plaid Cymru won 43 seats, six short of the 49 needed for a majority. Two Wales Green Members supplied the votes that elected Rhun ap Iorwerth First Minister on 12 May, without a written confidence-and-supply agreement, so every contested vote needs both.

The Programme for Government he presented on 22 September names no partner party and promises to "work constructively across the Senedd" where there is common ground.

Common Questions

Reference

What electoral system does the Senedd use?
Since the 2026 election the Senedd uses D'Hondt Closed-list proportional representation. Voters choose a party, not an individual candidate. Each of the 16 constituencies returns 6 MSs; approximately 12% of the constituency vote is needed to win a single seat.Source: Lowdown uk-elections-2026
When was the Senedd established?
The Senedd (then the National Assembly for Wales) was established under the Government of Wales Act 1998 and first sat in 1999. It was renamed Senedd Cymru / Welsh Parliament in 2020.
How many seats does the Senedd have?
The Senedd has 96 seats from the 2026 election, up from 60 previously. The expansion to 96 seats came alongside a switch from mixed-member proportional to closed-list D'Hondt PR across 16 six-member constituencies.
Who are the Members of the Senedd and how are they elected?
Members of the Senedd (MSs) are elected by party list under closed-list D'Hondt PR. Voters choose a party and the seats go to candidates in the party's pre-set list order. Each of 16 constituencies returns 6 MSs.

Recently resolved

Who controls the Senedd after the 2026 Welsh election?
Plaid Cymru won 43 of 96 seats and formed a minority government, with the 2 Wales Green MSs providing confidence and supply — a combined 45 seats, short of the 49-seat majority. First Minister Rhun ap Iorwerth governs through case-by-case support.Source: Lowdown uk-elections-2026
Source Material

Written with AI from Lowdown's published reporting. Not individually reviewed by an editor. Updated 7 October 2026. Editorial standards.