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Constituency

Hayes and Harlington

At a glance

Hayes and Harlington is a UK parliamentary constituency in London, currently represented in the House of Commons by John McDonnell, a Labour MP. John McDonnell has represented the seat since 1 May 1997. At the 2024 general election it was safe seat, won by a majority of 12,031 votes (31.4%), ranking #567 most marginal of 650 seats. Their Commons voting participation while representing this constituency is 79.1 %, compared with a Commons average of 72.7 %. Browse all seats on the UK constituencies index.

Constituency snapshot

Current representation signals for this constituency.

Current MP John McDonnell
Photograph of John McDonnell MP ID 178
Current party
Lab Labour
MP since 1 May 1997
Current Commons representation
Voting participation 79.1 %
1,867 of 2,361 eligible divisions
Region London
Electoral region of England, Scotland, Wales or Northern Ireland
Parliament ID 4091
Imported constituency identifier
Recent votes shown 10
Latest divisions listed below

Boundary

Imported constituency boundary for Hayes and Harlington.

Map

MP voting summary

How John McDonnell has voted since becoming MP for this constituency.

Voted in 1,867 of 2,361 eligible divisions (79.1 %).

79.1 %

Participation

1,017

Aye

850

No

24

Against party

Aye / No split Ayes 1,017 / Noes 850

Recent divisions

Division Vote
Draft Trade Unions (Permissible Means of Voting) and Employment Rights (Unfair Dismissal) (Amendment) Order 2026
Trade Work / Employment
Aye
Draft Code of Practice on Electronic and Workplace Ballots for Statutory Trade Union Ballots
Trade Work / Employment
Aye
Public Office (Accountability) Bill Report Stage: Amendment 19 No
Public Office (Accountability) Bill Report Stage: Amendment 199 No
Public Office (Accountability) Bill Report Stage: Amendment 3 No
Immigration and Asylum Bill: Second Reading
Migration
No
Immigration and Asylum Bill: Reasoned Amendment to Second Reading
Migration
No
Draft Supply of Machinery (Safety) (Amendment etc.) and the EU Machinery Regulation (Enforcement etc. in Northern Ireland) Regulations 2026 Aye
Draft Children’s Wellbeing and Schools Act 2026 (Establishment of Schools) (Consequential Amendments) Regulations 2026
Education
Aye
Draft Town and Country Planning (Discharge of Local Planning Authority Functions) (England) Regulations 2026 No
View full voting record →

Election results

How this seat has voted at general elections and by-elections. All UK election results →

Safe seat — won by 31.4% in 2024

Majority of 12,031 votes · #567 most marginal of 650 seats.

4 July 2024

51 % turnout · maj 12,031
John McDonnell · Labour 20,405 (53.3%)
Dylan Thomas · Conservative 8,374 (21.9%)
Francoise Thompson · Reform UK 4,114 (10.7%)
Christine West · Green Party 2,131 (5.6%)
Rizwana Karim · Workers Party of Britain 1,975 (5.2%)
Alexander Cunliffe · Liberal Democrat 1,316 (3.4%)

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Browse all UK constituencies →

Constituency source UK Parliament Members API
Member source UK Parliament member record

FAQs

Who is the MP for Hayes and Harlington?

John McDonnell is the current MP for Hayes and Harlington. Source

Which party currently holds Hayes and Harlington?

Hayes and Harlington is currently represented by John McDonnell of Labour. Source

What is the Parliament constituency ID for Hayes and Harlington?

Hayes and Harlington's imported Parliament constituency ID is 4091. Source

Where can I find the member profile for Hayes and Harlington?

The current MP profile for Hayes and Harlington is linked from this page and records party, roles, interests, election data, and voting record where available. Source

Can the MP for Hayes and Harlington change?

Yes. Constituency representation can change after a general election, by-election, resignation, recall petition, or other parliamentary change. Re-running the current MP import refreshes this data. Source

Where does Hayes and Harlington data come from?

Constituency and current MP data is imported from the UK Parliament Members API. Source