Lagan Valley (UK Parliament constituency)
Template:Short description Template:For Template:Use British English Template:Use dmy dates Template:Infobox UK constituency Lagan Valley is a Northern Ireland parliamentary constituency in the House of Commons of the United Kingdom covering the area of the Lagan Valley including the south part of County Antrim and the north-west part of County Down.
Its MP since the 2024 general election is Sorcha Eastwood of the Alliance Party.<ref>Template:Cite web</ref> This was the first time since its creation it did not elect a unionist MP.
Boundaries
The seat was created in 1983, as part of an expansion of Northern Ireland's constituencies from 12 to 17, and was predominantly made up from parts of South Antrim and North Down in the area of the River Lagan. In their original proposals, in January 1980, the boundary commission proposed calling it "Lagan". In further revisions in 1995 it lost some areas to both Belfast West and Strangford.
| 1983–1997 | The district of Lisburn, and in the borough of Castlereagh the ward of Carryduff.<ref>Schedule (a) County constituencies, Template:Cite web</ref> |
| 1997–2010 | In the district of Lisburn, the wards of Ballinderry, Ballymacash, Ballymacbrennan, Ballymacoss, Blaris, Derryaghy, Dromara, Drumbo, Dunmurry, Glenavy, Harmony Hill, Hilden, Hillhall, Hillsborough, Knockmore, Lagan Valley, Lambeg, Lisnagarvey, Maghaberry, Magheralave, Maze, Moira, Old Warren, Seymour Hill, Tonagh, and Wallace Park;
and in the district of Banbridge, the wards of Dromore North, Dromore South, Gransha, and Quilly.<ref>Template:Cite legislation UK</ref> |
| 2010–2024 | In the district of Banbridge, the wards of Dromore North, Dromore South, Gransha, and Quilly and the Ballynahatty and Edenderry parts of the Belvoir ward of the City of Belfast; and
in the city of Lisburn, the wards of Ballinderry, Ballymacash, Ballymacbrennan, Ballymacoss, Blaris, Dromara, Drumbo, Harmony Hill, Hilden, Hillhall, Hillsborough, Knockmore, Lagan Valley, Lambeg, Lisnagarvey, Maghaberry, Magheralave, Maze, Moira, Old Warren, Seymour Hill, Tonagh, Wallace Park, and that part of Derryaghy ward lying to the south and east of the Derryaghy and Lagmore townland boundary.<ref>Template:Cite legislation UK</ref> |
| 2024– | In the district of Armagh City, Banbridge and Craigavon, the wards of Aghagallon, the part of the Donaghcloney ward to the east of the western boundary of the 2010–2024 Lagan Valley constituency, Dromore, the part of the Gransha ward to the north of the southern boundary of the 2010–2024 Lagan Valley constituency, Magheralin, and Quilly; and
in the district of Lisburn and Castlereagh, the wards of Ballinderry, Ballymacash, Ballymacbrennan, Ballymacoss, Blaris, Dromara, Harmony Hill, Hilden, Hillhall, Hillsborough, Knockmore, Lagan, Lagan Valley, Lambeg, Lisnagarvey, Maghaberry, Magheralave, Maze, Moira, Old Warren, Ravernet, Wallace Park, and White Mountain.<ref>Template:Cite legislation UK</ref> |
Members of Parliament
MPs from Lagan Valley have included two party leaders: James Molyneaux, leader of the Ulster Unionist Party from 1979 to 1995 (having represented South Antrim from 1970 to 1979), and Jeffrey Donaldson, leader of the Democratic Unionist Party from 2021 to 2024, when he resigned as party leader and was suspended as a party member.<ref name="Guardian29Mar2024">Template:Cite news</ref>
| Election | MP<ref name="rayment">Template:Rayment-hc</ref> | Party | |
|---|---|---|---|
| 1983 | James MolyneauxTemplate:Efn | Template:Party name with colour | |
| 1986 b | |||
| 1987 | |||
| 1992 | |||
| 1997 | Jeffrey DonaldsonTemplate:Efn | Template:Party name with colour | |
| 2001 | |||
| 2004 | Template:Party name with colour | ||
| 2005 | |||
| 2010 | |||
| 2015 | |||
| 2017 | |||
| 2019 | |||
| 2024 | Template:Party name with colour<ref>Template:Cite web</ref> | ||
| 2024 | Sorcha Eastwood | Template:Party name with colour | |
Elections

Elections in the 2020s
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Elections in the 2010s
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This seat saw a swing towards the Alliance Party of over 17%, and the largest decrease in vote share for the DUP at the 2019 general election.<ref name="CBP-8749" />
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Elections in the 2000s
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Elections in the 1990s
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Elections in the 1980s
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References
External links
- 2017 Election House of Commons Library 2017 Election report
- A Vision Of Britain Through Time (Constituency elector numbers)
- Lagan Valley UK Parliament constituency (boundaries April 2010 – May 2024) at MapIt UK
- Lagan Valley UK Parliament constituency (boundaries from June 2024) at MapIt UK
Template:Current Westminster constituencies in Northern Ireland Template:County Antrim constituencies Template:County Down constituencies Template:Authority control Template:Coord