| Deirdre Costigan | |
| Honorific-Suffix: | MP |
| Office: | Member of Parliament for Ealing Southall |
| Term Start: | 4 July 2024 |
| Predecessor: | Virendra Sharma |
| Majority: | 15,793 (33.7%) |
| Office1: | Member of Ealing London Borough Council for Northolt Mandeville |
| Term Start1: | 3 May 2018 |
| Party: | Labour |
Deirdre Theresa Costigan[1] is an Irish politician and trade unionist who has been the Labour Party MP for Ealing Southall since 2024.[2]
Costigan was a shop steward for the trade union Unison. Before her election as an MP, she was Unison's national officer for disability equality.
In 2018, Costigan was elected as a Labour councillor for the Northolt Mandeville ward of Ealing London Borough Council. She was re-elected in 2022.[3] She served as deputy leader of the council for the three years preceding her election in 2024 as an MP.[4]
In the 2024 general election, Costigan was elected the Member of Parliament (MP) for Ealing Southall with 23,000 votes (49.1%) and a majority of 15,793 over the second place Conservative candidate.[5] On 18 July 2024, she made her maiden speech during a debate on foreign affairs and defence.[6]
She is openly LGBTQI+[7]