2026 review of Senedd constituencies

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The 2026 review of Senedd constituencies was conducted between July 2024 and March 2025 by the Democracy and Boundary Commission Cymru. The Senedd Cymru (Members and Elections) Act 2024 legislated that the 2026 Senedd election should use 16 six-member constituencies, replacing the existing 40 constituencies and five regions currently used for the Senedd (Welsh Parliament; Welsh : Senedd Cymru). [1] The constituencies are required by the law to be contiguous pairings of the 32 UK Parliament constituencies used in Wales since the 2024 UK election. The commission were also required by the law to give constituencies a single name in both Welsh and English, unless it could be considered unacceptable for a single name. The commission announced they are to all use Welsh-only names.

Contents

Background

The Senedd Cymru (Members and Elections) Act 2024, also nicknamed the "Senedd Reform Act", was introduced to the Senedd on 18 September 2023, [2] and received royal assent on 24 June 2024. It was the culmination of various proposals for reforming the Senedd, particularly the increase in the numbers of members of the Senedd, and changing the existing voting system. [3]

As part of the 2021 co-operation agreement between Welsh Labour and Plaid Cymru, the parties agreed on an expansion of the Senedd to between 80 and 100 Members and a more proportional voting method. [4] Leaders of the two parties announced in a May 2022 joint position statement calling for a 96-Member Senedd, all elected through closed party list proportional representation (using the D'Hondt method), as well as "zipping" of male and female candidates, so at least 50% of those on lists are women, [5] but the zipping proposal was later postponed in 2023. [6]

The 2024 act renamed the Local Democracy and Boundary Commission for Wales to the "Democracy and Boundary Commission Cymru", and gave it the responsibility to conduct boundary reviews of the Senedd constituencies for both the 2026 and 2030 Senedd elections, and regular boundary reviews thereafter. [7]

Following the reduction in the number of Welsh MPs and the implementation of new constituency boundaries for the 2024 UK general election, [8] the proposals [5] and subsequently the 2024 act, required the new Senedd constituencies to be contiguous pairings of the 32 UK Parliament constituencies used in Wales since the 2024. [9] Therefore there would be 16 constituencies, electing six members each, to replace the existing 40 constituencies and five regions. [10] The commission was also required by the law to give constituencies a single name in both Welsh and English, unless it could be considered unacceptable for a single name. [11] The commission later decided all the new constituencies were to use Welsh-only names. [12]

The review began in July 2024. [11] The 2026 review was time-constricted, [13] therefore the subsequent 2030 review, the first full boundary review in 18 years, would provide the commission with more flexibility. [14] [15]

Initial proposals (September 2024)

The Democracy and Boundary Commission Cymru revealed its initial proposals for the proposed new constituencies in September 2024, following the commencement of the review in July 2024. [9] [11]

Map of the 16 constituencies in the commission's initial proposals. Draft proposal (2024) Wales Senedd constituencies map.svg
Map of the 16 constituencies in the commission's initial proposals.
Initial proposed Senedd constituencyUK Parliament constituencies
Bangor Aberconwy Ynys Môn Bangor Aberconwy
Ynys Môn
Clwyd Clwyd East
Clwyd North
Alyn, Deeside and Wrexham Alyn and Deeside
Wrexham
Dwyfor Meirionnydd, Montgomeryshire and Glyndŵr Dwyfor Meirionnydd
Montgomeryshire and Glyndŵr
Ceredigion and Pembrokeshire Ceredigion Preseli
Mid and South Pembrokeshire
Carmarthenshire Caerfyrddin
Llanelli
Swansea West and Gower Swansea West
Gower
Brecon, Radnor, Neath and Swansea East Brecon, Radnor and Cwm Tawe
Neath and Swansea East
Aberafan Maesteg, Rhondda and Ogmore Aberafan Maesteg
Rhondda and Ogmore
Merthyr Tydfil, Aberdare and Pontypridd Merthyr Tydfil and Aberdare
Pontypridd
Blaenau Gwent, Rhymney and Caerphilly Blaenau Gwent and Rhymney
Caerphilly
Monmouthshire and Torfaen Monmouthshire
Torfaen
Newport and Islwyn Newport East
Newport West and Islwyn
Cardiff East and North Cardiff East
Cardiff North
Cardiff West, South and Penarth Cardiff West
Cardiff South and Penarth
Vale of Glamorgan and Bridgend Vale of Glamorgan
Bridgend

Revised proposals (December 2024)

In December 2024, the commission published its revised proposals following a consultation. The two major changes were the switching of the Cardiff constituencies into different pairs, [16] and the announcement that all (except four) of the constituencies will have Welsh-language names only, not having English-language names. [17]

The decision for only Welsh-language names received support from Cymdeithas yr Iaith, but the society called for the remaining four English names to be removed as well. They further suggested cutting the compass directions from the excepted names if needed for them to be Welsh-only. While Andrew RT Davies, former leader of the Welsh Conservatives, called the decision a "disenfranchise[ment]" of English-language only speakers, and called for constituencies covering English-speaking majority areas to have English-language names as well. [17] [18] The commission was required by law to give constituencies a single name for use in both languages, unless it was considered unacceptable. With four constituencies having bilingual names in the revised proposals. [11] [18]

Map of the revised proposal of the 16 new Senedd constituencies, in December 2024. The final map, released three months later, would have some constituencies named differently and different boundaries in Cardiff. Revised proposal (2024) Wales Senedd constituencies labelled map.svg
Map of the revised proposal of the 16 new Senedd constituencies, in December 2024. The final map, released three months later, would have some constituencies named differently and different boundaries in Cardiff.
Revised proposed Senedd constituencyUK Parliament constituencies
Afan Ogwr Rhondda Aberafan Maesteg
Rhondda and Ogmore
Rhondda ac Ogwr (Welsh)
Bangor Conwy Môn Bangor Aberconwy
Ynys Môn
Blaenau Gwent Caerffili Rhymni Blaenau Gwent and Rhymney
Blaenau Gwent a Rhymni (Welsh)
Caerphilly
Caerffili (Welsh)
Gogledd-orllewin Caerdydd
Cardiff North-west (English)
Cardiff North
Gogledd Caerdydd (Welsh)
Cardiff West
Gorllewin Caerdydd (Welsh)
De-ddwyrain Caerdydd Penarth
Cardiff South-east Penarth (English)
Cardiff East
Dwyrain Caerdydd (Welsh)
Cardiff South and Penarth
De Caerdydd a Phenarth (Welsh)
Casnewydd Islwyn Newport East
Dwyrain Casnewydd (Welsh)
Newport West and Islwyn
Gorllewin Casnewydd ac Islwyn (Welsh)
Ceredigion Penfro Ceredigion Preseli
Mid and South Pembrokeshire
Canol a De Sir Benfro (Welsh)
Clwyd Clwyd East
Clwyd North
Fflint Wrecsam Alyn and Deeside
Wrexham
Wrecsam (Welsh)
Gwynedd Maldwyn Dwyfor Meirionnydd
Montgomeryshire and Glyndŵr
Maldwyn a Glyndŵr (Welsh)
Sir Gâr Caerfyrddin
Llanelli
De Powys Tawe Nedd
South Powys Tawe Neath (English)
Brecon, Radnor and Cwm Tawe
Neath and Swansea East
Castell Nedd a Dwyrain Abertawe (Welsh)
Gorllewin Abertawe Gŵyr
Swansea West Gower (English)
Swansea West
Gorllewin Abertawe (Welsh)
Gower
Gŵyr (Welsh)
Merthyr Cynon Taf Merthyr Tydfil and Aberdare
Pontypridd
Mynwy Torfaen Monmouthshire
Sir Fynwy (Welsh)
Torfaen
Pen-y-bont Bro Morgannwg Vale of Glamorgan
Bro Morgannwg (Welsh)
Bridgend
Pen-y-bont ar Ogwr (Welsh)

Final proposals (March 2025)

In March 2025, the commission published its final determinations, [19] for the 16 constituencies, with the only change in boundaries being to revert the two Cardiff constituencies back to the pairing of the initial proposals, Cardiff NorthCardiff East and Cardiff WestCardiff South and Penarth, creating Caerdydd Ffynnon Taf and Caerdydd Penarth respectively. [12]

By law, the Senedd must put these final determinations into effect for the 2026 Senedd election without alteration. [20] The commission is to conduct another full boundary review of Senedd constituencies following the 2026 election and the first in 18 years, for the subsequent Senedd election scheduled for 2030. [12] [21]

Labelled map of the 16 new Senedd constituencies. Wales2026SeneddConstituencies labelled map.svg
Labelled map of the 16 new Senedd constituencies.
Senedd constituencyUK parliament constituencies
Afan Ogwr Rhondda Aberafan Maesteg
Rhondda and Ogmore
Rhondda ac Ogwr (Welsh)
Bangor Conwy Môn Bangor Aberconwy
Ynys Môn
Blaenau Gwent Caerffili Rhymni Blaenau Gwent and Rhymney
Blaenau Gwent a Rhymni (Welsh)
Caerphilly
Caerffili (Welsh)
Caerdydd Ffynnon Taf Cardiff North
Gogledd Caerdydd (Welsh)
Cardiff East

Dwyrain Caerdydd (Welsh)

Caerdydd Penarth Cardiff West
Gorllewin Caerdydd (Welsh)
Cardiff South and Penarth
De Caerdydd a Phenarth (Welsh)
Casnewydd Islwyn Newport East
Dwyrain Casnewydd (Welsh)
Newport West and Islwyn
Gorllewin Casnewydd ac Islwyn (Welsh)
Ceredigion Penfro Ceredigion Preseli
Mid and South Pembrokeshire
Canol a De Sir Benfro (Welsh)
Clwyd Clwyd East
Clwyd North
Fflint Wrecsam Alyn and Deeside
Wrexham
Wrecsam (Welsh)
Gwynedd Maldwyn Dwyfor Meirionnydd
Montgomeryshire and Glyndŵr
Maldwyn a Glyndŵr (Welsh)
Sir Gaerfyrddin Caerfyrddin
Llanelli
Brycheiniog Tawe Nedd Brecon, Radnor and Cwm Tawe
Neath and Swansea East
Castell Nedd a Dwyrain Abertawe (Welsh)
Gŵyr Abertawe Swansea West
Gorllewin Abertawe (Welsh)
Gower
Gŵyr (Welsh)
Pontypridd Cynon Merthyr Merthyr Tydfil and Aberdare
Pontypridd
Sir Fynwy Torfaen Monmouthshire
Sir Fynwy (Welsh)
Torfaen
Pen-y-bont Bro Morgannwg Vale of Glamorgan
Bro Morgannwg (Welsh)
Bridgend
Pen-y-bont ar Ogwr (Welsh)

Welsh-only names

In the final proposals, several constituency names were changed, giving all of them a single Welsh-only name, including the remaining four which had been bilingual in the revised proposals. This met the conditions set in law that the constituencies must have a single name for use in Welsh and English, unless it was considered unacceptable. [11]

The use of all Welsh-only names prompted a re-iteration of support from Cymdeithas yr Iaith chairman Joseff Gnagbo, who stated the move to be an "important precedent" for any future constituencies to also have Welsh-only names and for Welsh-only names to be used in other contexts as well. While the move received condemnation from former Welsh Conservative leader Andrew RT Davies stating that respondents to the commission's consultation mentioned that it "disenfranchised them", commenting that "they were ignored", and that "Wales is bilingual and constituency names should be in both languages". [12] Other Conservative MSs from Powys claimed the larger constituencies means the link between representatives and constituents "will be lost" and criticised the loss of "Radnorshire" from the map. [22]

The commission stated the Welsh-only names were "acceptable and recognisable for people across Wales". [12] Shreen Williams, the head of the commission, stated that the move prompted a "pushback", but backed it stating that the opposition they received was "primarily [...] anti-Welsh sentiment", [23] which was "incredibly disappointing". [12] The final consultation had over 4,000 responses [24] and was described by the commission to have received more responses then any other consultation "by a considerable margin". [25]

References

  1. "Senedd reform | GOV.WALES". www.gov.wales. 2024-08-21. Retrieved 2024-08-24.
  2. "Senedd Cymru (Members and Elections) Bill: integrated impact assessment". Welsh Government. 18 September 2023. Retrieved 23 September 2023.
  3. McAllister, Laura; Wyn Jones, Richard; Larner, Jac (2022). "Improving democracy in Wales". Cardiff University. Retrieved 23 September 2022.
  4. "The Co-operation Agreement: full policy programme". The Government of Wales. 1 December 2021. Retrieved 23 September 2023.
  5. 1 2 "Press release: A way forward for Senedd reform". Government of Wales. 10 May 2022. Retrieved 23 September 2023.
  6. "Welsh government: Senedd gender quota plan postponed". BBC News. 2023-11-29. Retrieved 2025-03-16.
  7. "Democracy and Boundary Commission Cymru [HTML] | GOV.WALES". www.gov.wales. 2024-12-17. Retrieved 2025-03-16.
  8. Masters, Adrian (19 October 2022). "Number of Welsh MPs to be cut from 40 to 32 under new proposals". ITV News. Retrieved 23 September 2023.
  9. 1 2 "2026 Review: Initial Proposals | DBCC". www.dbcc.gov.wales. 2024-09-03. Retrieved 2024-09-08.
  10. "Senedd reform | GOV.WALES". www.gov.wales. 2024-08-21. Retrieved 2024-08-24.
  11. 1 2 3 4 5 "New constituencies for the 2026 Senedd election announced". research.senedd.wales. Retrieved 2025-03-14.
  12. 1 2 3 4 5 6 "Senedd expansion: Welsh-only names for all Welsh Parliament seats". BBC News. 2025-03-11. Retrieved 2025-03-11.
  13. Price, Emily (2025-03-11). "New Senedd 'super constituencies' confirmed". Nation.Cymru. Retrieved 2025-03-11.
  14. "Senedd expansion: Welsh-only names for all Welsh Parliament seats". BBC News. 2025-03-11. Retrieved 2025-03-11.
  15. "Final constituencies created ahead of 2026 Senedd elections". South Wales Argus. 2025-03-11. Retrieved 2025-03-14.
  16. Price, Emily (17 December 2024). "Revised Senedd constituency proposals published". Nation.Cymru.
  17. 1 2 "Welsh-only names for most new big Senedd seats revealed". BBC News. 17 December 2024.
  18. 1 2 "Proposed Senedd constituency names divides opinion". ITV News . 17 December 2024.
  19. "2026 Review: Final Determinations | DBCC". www.dbcc.gov.wales. 2025-03-11. Retrieved 2025-03-14.
  20. Price, Emily (2025-03-11). "New Senedd 'super constituencies' confirmed". Nation.Cymru. Retrieved 2025-03-11.
  21. "Final constituencies created ahead of 2026 Senedd elections". South Wales Argus. 2025-03-11. Retrieved 2025-03-14.
  22. "Anger as Powys constituency 'wiped off the map' by Senedd boundary changes". County Times. 2025-03-11. Retrieved 2025-03-14.
  23. Mosalski, Ruth (2025-03-10). "Boundary Commission faces backlash over Welsh-only names for constituencies". Wales Online. Retrieved 2025-03-11.
  24. Mosalski, Ruth (2025-03-11). "Wales Senedd election 2026 constituencies confirmed as final maps published". Wales Online. Retrieved 2025-03-14.
  25. "Senedd 2026: Row over Welsh-only names as new constituencies announced". Sky News. Retrieved 2025-03-14.