UK general elections › 2010 › Lagan Valley
Lagan Valley — 2010
Jeffrey Donaldson (Democratic Unionist Party) was elected with 18,199 votes— 49.8% of 36,540 valid votes. Under First Past the Post, a plurality is enough; a majority is not required.
Result · single-seat
Marginal winner Winning candidate's share of valid votes. 49.8% Proportional quota 50.0% Below quota Winning candidate's share minus the proportional quota (50% for a single-member seat). Negative = below; positive = above. −0.2 pts Valid ballots Voters who cast a valid ballot in this constituency, from the published source. 36,540
| Rank | Candidate | Party | Votes | Share of votes Candidate votes ÷ valid votes in this constituency. Matches the share the returning officer publishes. | Below quota Elected candidate's share of valid votes minus the proportional quota (50% for a single-member seat). Negative = won the seat below the quota; positive = cleared it. | Elected |
|---|---|---|---|---|---|---|
| 1 | Jeffrey Donaldson | Democratic Unionist Party | 18,199 | 49.8% | −0.2 pts | Elected |
| 2 | Daphne Trimble | Independent | 7,713 | 21.1% | — | |
| 3 | Trevor Lunn | Alliance | 4,174 | 11.4% | — | |
| 4 | Keith Harbinson | Traditional Unionist Voice | 3,154 | 8.6% | — | |
| 5 | Brian Heading | Social Democratic & Labour Party | 1,835 | 5.0% | — | |
| 6 | Paul Butler | Sinn Féin | 1,465 | 4.0% | — |
Source data: UK Parliament psephology database, retrieved
2026-05-19, generated
2026-05-19
(Open Parliament Licence v3.0). ETL version parliament-etl-psephology@1. Methodology: how these numbers are computed.