Following local government boundary reviews which came into effect in May 2022,[6][7] the constituency now comprises the following from the 2024 general election:[8]
The City and County of Cardiff wards of Caerau, Canton, Ely, Fairwater, Llandaff, Pentyrch and St Fagans, Radyr, and Riverside.
The County Borough of Rhondda Cynon Taf wards of Pontyclun Central, Pontyclun East, and Pontyclun West (part).
Until 2024 Cardiff West was entirely within the boundaries of the City of Cardiff.
Population areas within the constituency include Riverside, Pontcanna, St Fagans and Ely. There are some Conservative and Plaid Cymru-leaning areas in the north of the seat such as Creigiau and St Fagans, Pentyrch and Radyr, but the bulk of the seat comprises districts towards the centre of Cardiff such as Caerau, Canton, Ely and Riverside which are very strongly Labour.
A traditionally safe Labour seat, represented for 33 years by George Thomas (who became Speaker in 1976 and was re-elected without party affiliation in 1979). It has returned a Conservative only once, in the Tories' landslide year of 1983, when Stefan Terlezki became the MP.
Labour regained the seat at the next general election in 1987, when Rhodri Morgan was elected. After the creation of the Welsh Assembly Government, Morgan stepped down from his Westminster seat in 2001 to serve as leader of Welsh Labour and First Minister for Wales. Kevin Brennan retained the seat for Labour on Morgan's retirement from Westminster politics. Following the announcement of the date of the 2024 general election Brennan announced his retirement from politics.[9]
The selection of Barros-Curtis as Labour candidate, with minimal input from local party members, was criticised. He is the Labour Party's executive director of legal affairs.[41] Barros-Curtis had no connection to the Cardiff area, though had grown up in North Wales.[42]
^ abcdefgCraig, F. W. S. (1971). British parliamentary election results 1950–1970 (1 ed.). Chichester: Political Reference Publications. ISBN9780900178023. Page 556
^"Politics Resources". Election February 1974. Politics Resources. 28 February 1974. Archived from the original on 11 August 2011. Retrieved 2 February 2021.
^"Politics Resources". Election October 1974. Politics Resources. 10 October 1974. Archived from the original on 11 August 2011. Retrieved 2 February 2021.
^"Politics Resources". Election 1979. Politics Resources. 3 May 1979. Archived from the original on 11 August 2011. Retrieved 2 February 2021.