Plaid Cymru Defence

Below are lists of Plaid Cymru marginal seats showing which constituencies won in the latest elections can be most easily lost.

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Plaid Cymru Defence 2024

Below is the Plaid Cymru defence list consisting of Plaid Cymru held marginal seats for the 2024 general election. These marginal constituencies are ordered from the smallest to the largest swing to be defeated by the largest opposition party.

View Plaid Cymru target seats for the next general election.

(order by percentage majority)

RankConstituencyRegionMajoritySwing to Defeat
1.Ceredigion PreseliWales1,4431.40%
2.Dwyfor MeirionnyddWales9,8809.78%

View Plaid Cymru target seats for the next general election.

Plaid Cymru Defence for the 2026 Senedd Election

Below is the Plaid Cymru defence list consisting of Plaid Cymru held marginal seats for the 2026 Senedd election. These marginal constituencies are ordered from the smallest to the largest swing to be defeated by the largest opposition party.

View Plaid Cymru target seats for the next Senedd election.

(order by percentage majority)

RankConstituencyRegionMajoritySwing to Defeat
1.Carmarthen East and DinefwrMid and West Wales6,81310.24%
2.Dwyfor MeirionnyddMid and West Wales7,09614.90%
3.Ynys MonNorth Wales9,81717.70%
4.CeredigionMid and West Wales12,14519.74%
5.ArfonNorth Wales8,65219.89%

View Plaid Cymru target seats for the next Senedd election.

2024 General Election
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