Riding profile

Cardiff South and Penarth

UK constituency — Wales · Urban · wales

The question

Cardiff South and Penarth: who wins this toss-up?

Editorial read

Cardiff South and Penarth, an urban constituency in Wales, elected a member with Labour in the previous cycle, with a 30-point margin. The Vote-Scope model projects the Green Party ahead at 28% vote share, against 27% for Labour, and the race could swing.

Sitting member

Stephen Doughty

Sits with Labour

Since
2012-11-15
Parliament
59th

Current forecast

Green

Toss-up

Probability
99%
Mean margin (pts)
1.8
P(close race)
100%

Projected vote share

Projection by party

  • Green 27.5%
  • Labour 27.4%
  • Reform UK 14.2%
  • Plaid Cymru 12.7%
  • Conservative 10.4%
  • Lib Dems 6.9%
  • Other 0.6%

In context

How this riding stacks up

Green Labour Reform UK Plaid Cymru
HereCardiff South and Penarth 27.5%27.4%14.2%12.7%
National averageUnited Kingdom 11.8% +15.7 21.7% +5.8 25.3% −11.1 1.0% +11.7

Nationwide averages computed across the 650 riding-level projections (unweighted mean).

Previous election · UK 2024

Won by
Labour
Margin
30.0 pts
Margin shift vs current projection
-28.2 pts

Detailed result · UK 2024

Candidates and votes

Candidate Party Votes % Occupation
Stephen Doughty Elected Labour 17,428 44.5
Anthony Slaughter Green 5,661 14.4
Ellis Smith Conservative 5,459 13.9
Simon Llewellyn Reform UK 4,493 11.5
Sharifah Rahman Plaid Cymru 3,227 8.2
Alex Wilson Lib Dems 2,908 7.4

Demographics

Who lives here

Population
109,698
Median age
30
Employment rate
80.7%

Data source : ONS mid-2022 population + Jan 2026 labour market

Last model run
Cycle
uk_2029