MP for Ealing Southall
Assistant Whip
“A loyal Labour MP and Assistant Whip with unusually low voting attendance.”
Deirdre Costigan is a Labour (Co-op) MP for Ealing Southall, elected in July 2024. She serves as an Assistant Whip and sits on the Rare Cancers Bill committee, with previous committee roles including Health and Social Care and several public bill committees.
Her voting pattern shows complete party loyalty with no rebel votes, but unusually low attendance at 15% compared with the party average of 33%. She generally votes in line with Labour on workers’ rights and renter protections, with a mixed record on Universal Credit, and she has tended to oppose measures on mental health services and protest rights.
Declares one entry under gifts, benefits and hospitality from UK sources.
Generated 21 February 2026
How this MP participates in parliamentary votes. These numbers describe activity, not effectiveness.
How often this MP votes
Labour (Co-op) average: 33%
The percentage of parliamentary votes (divisions) this MP participated in. MPs may miss votes for legitimate reasons including ministerial duties, constituency work, or illness.
How often this MP votes with their party
Labour (Co-op) average: 99%
Estimated from voting record, not self-declared. This is a simplified model — real politics is more complex than a single axis.
5 positions
Assistant Whip
Since Sept 2025
Rare Cancers Bill
Since Jun 2025
English Devolution and Community Empowerment Bill
Sept 2025 - Oct 2025
Non-Domestic Rating (Multipliers and Private Schools) Bill
Dec 2024 - Dec 2024
Health and Social Care Committee
Oct 2024 - Mar 2025
Figures include only interests with declared monetary values from the Register of Members' Financial Interests. Some categories (e.g. hospitality, overseas visits) may not have monetary values recorded, so the total may not reflect all declared interests.
Draft Greenhouse Gas Emissions Trading Scheme (Amendment) Order 2026
AYEDraft Medical Devices (Fees Amendment) Regulations 2026
AYEMedical Training (Prioritisation) Bill: Amendment 1
NOMedical Training (Prioritisation) Bill
Medical Training (Prioritisation) Bill: Amendment 2
NOMedical Training (Prioritisation) Bill
Medical Training (Prioritisation) Bill: Amendment 9
NOMedical Training (Prioritisation) Bill
The Northern Ireland Troubles (Legacy and Reconciliation) Act 2023 (Remedial) Order 2025
AYENational Insurance Contributions (Employer Pensions Contributions) Bill: Third Reading
AYENational Insurance Contributions (Employer Pensions Contributions) Bill
National Insurance Contributions (Employer Pensions Contributions) Bill Committee: New Clause 5
NONational Insurance Contributions (Employer Pensions Contributions) Bill
National Insurance Contributions (Employer Pensions Contributions) Bill Committee: Amendment 5
NONational Insurance Contributions (Employer Pensions Contributions) Bill
Diego Garcia Military Base and British Indian Ocean Territory Bill: motion to disagree with Lords Amendment 6
AYEDiego Garcia Military Base and British Indian Ocean Territory Bill
Diego Garcia Military Base and British Indian Ocean Territory Bill: motion to disagree with Lords Amendment 5
AYEDiego Garcia Military Base and British Indian Ocean Territory Bill
Diego Garcia Military Base and British Indian Ocean Territory Bill: motion to disagree with Lords Amendment 1
AYEDiego Garcia Military Base and British Indian Ocean Territory Bill
Sentencing Bill: motion to disagree with Lords Amendment 7
AYESentencing Bill
Draft Public Order Act 2023 (Interference With Use or Operation of Key National Infrastructure) Regulations 2025
AYEFinance (No. 2) Bill Committee: New Clause 26
NOFinance (No. 2) Bill
The percentage of votes where this MP voted the same way as the majority of their party. High loyalty is typical; most MPs vote with their party on most issues.
Rebel votes
Times this MP voted differently from the majority of their party. This can reflect independent judgement, but context matters — some rebel votes are on procedural matters, others on major policy.
