Compare elections
Senedd 2021 vs Senedd 2026
Wales's last full Senedd election sat 60 Members under the Additional Member System. The 2026 vote returns 96 Members from 16 new constituencies under closed-list D'Hondt PR. Seats are not directly comparable, but vote share and the headline swing tell the story.
May 2021
Senedd 2021
60 Members elected by the Additional Member System: 40 from constituencies (FPTP) and 20 from 5 regional lists (closed-list PR).
Seats
60 / 60
- Welsh Labour30
- Welsh Conservatives16
- Plaid Cymru13
- Welsh Liberal Democrats1
May 2026
Senedd 2026
96 Members from 16 constituencies, closed-list D'Hondt PR.
Seats (Awaiting first declaration)
0 / 96
Swing
2021 → 2026
Live vote share fills in as declarations arrive.
| Party | 2021 vote | 2026 vote | Swing (pp) | 2021 seats | 2026 seats | Δ seats |
|---|---|---|---|---|---|---|
| Welsh Labour | 39.9% | - | - | 30 | - | - |
| Welsh Conservatives | 26.1% | - | - | 16 | - | - |
| Plaid Cymru | 20.3% | - | - | 13 | - | - |
| Other | 8.1% | - | - | 0 | - | - |
| Welsh Liberal Democrats | 4.3% | - | - | 1 | - | - |
| Wales Green Party | 1.0% | - | - | 0 | - | - |
| Reform UK | 0.3% | - | - | 0 | - | - |
Vote share is the constituency-vote share in 2021 vs the aggregated declared-vote share in 2026. Seat totals are not directly comparable (60 vs 96 Members under different systems and boundaries) - use the per-constituency notional baselines on the Senedd 2026 tracker for like-for-like swing.