
1 

(1) The title of these Regulations is the Senedd Cymru Constituency Regulations 2025.
(2) These Regulations come into force on 18 July 2025.
(3) Despite the coming into force of these Regulations under regulation 1(2), they do not have effect in relation to a general election the poll for which is held on or before 6 April 2026.
(4) In this regulation—
 “general election” means an ordinary general election, or an extraordinary general election, held under Part 1 of the 2006 Act.
2 
In these Regulations—
 “the 2006 Act” (“Deddf 2006”) means the Government of Wales Act 2006;
 “Senedd” (“Senedd”) has the same meaning as in section 1(1) of the 2006 Act;
 “Senedd constituencies” (“etholaethau’r Senedd”) means the constituencies defined in the table in the Schedule to these Regulations, which return a Senedd Member as specified in Part 1 of the 2006 Act.
3 
The following Orders are revoked—
(a) the Parliamentary Constituencies and Assembly Electoral Regions (Wales) Order 2006, and
(b) the Parliamentary Constituencies and Assembly Electoral Regions (Wales) (Amendment) Order 2011.
4 

(1) Wales is divided into Senedd constituencies—
(a) which are named in column 1 of the table in the Schedule,
(b) which are designated as county or borough constituencies in that column, and
(c) which comprise the UK parliamentary constituencies which are set out in columns 2 and 3 of that table, opposite the name of the constituency in column 1.
(2) In this regulation—
 “UK parliamentary constituency” (“etholaeth seneddol y DU”) means a United Kingdom parliamentary constituency created by the Parliamentary Constituencies Order 2023 (“the 2023 Order”), which returns a member of Parliament of the United Kingdom, disregarding the operative effect of any amendments or alterations to the 2023 Order after the date on which these Regulations are made.
5 
Each electoral registration officer must re-arrange or adapt the register of local government electors maintained under section 9(1)(b) and (5A) of the Representation of People Act 1983, as required to give effect to these Regulations.
Jayne Bryant
Cabinet Secretary for Housing and Local Government, one of the Welsh Ministers
16 June 2025
SCHEDULE
Regulation 4


Table 1
Name of Senedd constituencies UK parliamentary constituencies
Constituency 1 Constituency 2
Bangor Conwy MônCounty Constituency Bangor Aberconwy Ynys Môn
ClwydCounty Constituency Clwyd East Clwyd North
Fflint WrecsamCounty Constituency Alyn and Deeside Wrexham
Gwynedd MaldwynCounty Constituency Dwyfor Meirionnydd Montgomeryshire and Glyndŵr
Ceredigion PenfroCounty Constituency Ceredigion Preseli Mid and South Pembrokeshire
Sir GaerfyrddinCounty Constituency Caerfyrddin Llanelli
Gŵyr AbertaweCounty Constituency Gower Swansea West
Brycheiniog Tawe NeddCounty Constituency Brecon, Radnor and Cwm Tawe Neath and Swansea East
Afan Ogwr RhonddaCounty Constituency Aberafan Maesteg Rhondda and Ogmore
Pontypridd Cynon MerthyrCounty Constituency Merthyr Tydfil and Aberdare Pontypridd
Blaenau Gwent Caerffili RhymniCounty Constituency Blaenau Gwent and Rhymney Caerphilly
Sir Fynwy TorfaenCounty Constituency Monmouthshire Torfaen
Casnewydd IslwynCounty Constituency Newport East Newport West and Islwyn
Caerdydd PenarthCounty Constituency Cardiff West Cardiff South and Penarth
Caerdydd Ffynnon TafCounty Constituency Cardiff North Cardiff East
Pen-y-bont Bro MorgannwgCounty Constituency Bridgend Vale of Glamorgan