Photograph of Dame Siobhain McDonagh

Member of Parliament

Dame Siobhain McDonagh

Profile, voting record, roles, interests, and election information from official Parliament data.

At a glance

1 May 1997

Commons start

29 years, 0 months

Time in Commons

55.3 %

Voting participation

-18.0 % vs avg

18,761

Majority

25

Debates (12 months)

26

Contributions

Voting activity (12 months)

Debate activity (12 months)

Contact

Parliamentary office

[email protected] 020 7219 4678

Constituency office

[email protected] 020 8542 4835

X (formerly Twitter)

https://x.com/siobhain_mc

Topic voting

Where this MP has been most and least active across locally tagged Commons division topics.

Highest topic participation

Brexit / EU 147/211 (70 %)
Education 63/95 (66 %)
Defence 36/55 (65 %)
Foreign Affairs 45/69 (65 %)
Trade 57/88 (65 %)

Lowest topic participation

Cost of Living 2/10 (20 %)
Migration 67/169 (40 %)
Energy 27/67 (40 %)
Housing 32/66 (48 %)

Party history

Labour 1 May 1997 to present

Constituency

Constituency history

Mitcham and Morden 4 Jul 2024 to present Elected 1 time
Mitcham and Morden 6 May 2010 to 30 May 2024 Elected 4 times
Mitcham and Morden 1 May 1997 to 6 May 2010 Elected 3 times

Roles

Rare Cancers Bill 26 Jun 2025 to present
Treasury Committee 21 Oct 2024 to present
Panel of Chairs 30 Jul 2024 to present
Finance Bill 10 Jan 2024 to 10 Jan 2024
Renters (Reform) Bill 8 Nov 2023 to 28 Nov 2023
Social Housing (Regulation) Bill [HL] 23 Nov 2022 to 29 Nov 2022
Financial Services and Markets Bill 12 Oct 2022 to 3 Nov 2022
Treasury Sub-Committee on Financial Services Regulations 20 Jun 2022 to 30 May 2024

Latest election result

Candidate result data from the Parliament Members API.

Lab Hold Mitcham and Morden Turnout 45,255
Candidate Party Votes Share
Siobhain McDonagh Lab Labour 25,085 55.4 %
Ellie Cox Con Conservative 6,324 14.0 %
Pippa Maslin Green Green Party 4,635 10.2 %
Ruth Price RUK Reform UK 4,135 9.1 %
Jenifer Gould LD Liberal Democrat 3,622 8.0 %
Mehmood Jamshed WPB Workers Party of Britain 1,091 2.4 %
Desmond Coke Christian Peoples Alliance 363 0.8 %

Source: UK Parliament Members API

Voting record

Commons division votes from the official Commons Votes API.

Voted in 1,272 of 2,302 eligible divisions (55.3 %). Commons average: 73.3 %.

1272

Total votes

734

Aye

538

No

19

Against party

Aye / No split Ayes 734 / Noes 538

Divisions

Page 1 of 85
Division Vote
Draft Immigration and Asylum (Provision of Accommodation to Failed Asylum-Seekers) (Amendment) Regulations 2026 Aye
Draft Asylum Seekers (Reception Conditions) (Amendment) Regulations 2026 Aye
Pension Schemes Bill: motion to disagree with Lords Amendments 15 to 24, 27, 30 to 34, 36, 38 to 42, 83 and 88, insist on Amendments 88C, 88E to 88P, 88R, 88S and 88W, and propose Amendments (a) to (j) in lieu of Amendments 88A, 88T, 88U and 88V Aye
Privilege No
Children's School and Wellbeing Bill: Amendments (a) to (j) in lieu of Lords Amendments 38V to 38X Aye
Northern Ireland Troubles Bill: Carry-over motion Aye
Pension Schemes Bill: motion to disagree with Lords Amendments 15 to 24, 27, 30 to 34, 36, 38 to 42, 83 and 88, insist on its Amendments 88A, 88C and 88E to 88P and propose Amendments (a) to (f) Aye
English Devolution and Community Empowerment Bill: Amendments (a) to (h) in lieu of Lords Amendments 85 and 86, 97 to 116, 120, 121 and 123 Aye
English Devolution and Community Empowerment Bill: motion to disagree with Lords Amendments 94B and 94C Aye
English Devolution and Community Empowerment Bill: motion to disagree with Lords Amendments 36, 90 and 155, insist on Amendments 155A to 155F and propose Amendment (a) Aye
English Devolution and Community Empowerment Bill: motion to disagree with Lords Amendments 89B and 89C Aye
Crime and Policing Bill: motion to insist on Amendments 439C and 439D and disagree with Lords Amendments 439E and 439F Aye
Children's Wellbeing and Schools Bill: motion to insist on Amendment 38J and disagree with Lords Amendments 38V to 38X Aye
Pensions Schemes Bill: motion to disagree with Lords Amendments 15 to 24, 27, 30 to 34, 36, 38 to 42, 83 and 88, insist on Amendments 88A and 88C and propose amendments (a) to (j) in lieu of Amendment 88B Aye
Draft Energy Prices Act 2022 (Extension of Time Limit) Regulations 2026 Aye

Source: Commons Votes API

Debate activity

Parliamentary debate appearances from Hansard. Contribution counts cover the last 12 months.

9

Speeches

5

Questions

11

Interventions

0

Answers

1

Points of order

0

Statements

Most active debate topics

Transport 2 appearances
Tax 1 appearances
Cost of Living 1 appearances
Energy 1 appearances
Education 1 appearances

Recent appearances

Debate Contributions
Backing Business to Create Economic Growth 18 May 2026 1
NHS Federated Data Platform 16 Apr 2026 0
Topical Questions 14 Apr 2026 1
Northern Ireland: Legacy of the Past 19 Mar 2026 0
Engagements 11 Mar 2026 1
Brain Tumour Survival Rates 9 Feb 2026 5
Food Inflation 15 Jan 2026 0
Advanced Brain Cancer: Tissue Freezing 7 Jan 2026 4
Less Survivable Cancers 6 Jan 2026 1
Acquired Brain Injury Action Plan 4 Dec 2025 0

Source: UK Parliament Hansard API

Registered interests

No registered interests available.

Member source UK Parliament Members API
Voting source Commons Votes API
Debate source UK Parliament Hansard API

FAQs

Who is Dame Siobhain McDonagh?

Dame Siobhain McDonagh is a Member of Parliament representing Mitcham and Morden. Source

Which party does Dame Siobhain McDonagh represent?

Dame Siobhain McDonagh currently represents Labour. Source

Which constituency does Dame Siobhain McDonagh represent?

Dame Siobhain McDonagh currently represents Mitcham and Morden. Source

How long has Dame Siobhain McDonagh been an MP?

Dame Siobhain McDonagh has been in the House of Commons for 29 years, 0 months. Source

How many Commons divisions has Dame Siobhain McDonagh voted in?

Dame Siobhain McDonagh has recorded votes in 1,272 of 2,302 eligible Commons divisions (55.3 % participation rate). The Commons average is 73.3 %. Eligible divisions are those occurring on or after the MP's Commons membership start date. Source

Has Dame Siobhain McDonagh voted against their party?

Dame Siobhain McDonagh has voted against the party majority 19 times in the imported division data. Source

What roles has Dame Siobhain McDonagh held?

Dame Siobhain McDonagh has 16 imported role records. The roles section lists the most recent roles available from the Parliament biography data. Source

What was Dame Siobhain McDonagh's latest election result?

Dame Siobhain McDonagh's latest imported election result is Lab Hold in Mitcham and Morden, with a majority of 18,761. Source

How active is Dame Siobhain McDonagh in parliamentary debates?

Dame Siobhain McDonagh has made 26 contributions across 25 debate appearances in the last 12 months, according to Hansard records. Source