Olivia Frances Blake-Dagnall[1] (born 10 March 1990)[2] is a British Labour politician who has been the Member of Parliament (MP) for Sheffield Hallam since 2019.

[5] In 2018, Blake was elected to Labour's National Policy Forum with the endorsement of the left-wing groups Momentum and the Centre-Left Grassroots Alliance.

Blake said she was elected as Deputy Leader "on a ticket of reform", and worked to in-source council contracts and tackle privatisation.

Blake later resigned as Deputy Leader to support a grassroots movement to change the democratic structure of the council, remaining as a councillor.

She indicated that she intends to "contribute a socialist voice to the referendum debate", to open up a "wider discussion on how to rejuvenate our democracy in Sheffield.

[15][16] In her maiden speech to Parliament, Blake said that the Sheffield Hallam constituency had a "very long history of social justice", as Robin Hood mythology points to a Yorkshire origin in Loxley.

[23] After Wetherspoons' owner Tim Martin was inaccurately reported to have told his 43,000 employees that they would not be furloughed during the COVID-19 pandemic, and should go work at Tesco,[24] Blake, as vice-chair of the BFAWU Parliamentary Group, coordinated a cross-party letter of 95 MPs to calling on Martin to "put people and not profits first" and continue to pay Wetherspoons workers.

[27] Blake was forced to resign from her position as PPS to Jo Stevens and Ian Murray in September 2020 when she, alongside 18 other Labour MPs, including two other junior office holders, Beth Winter and Nadia Whittome, defied the Labour whip and voted against the Overseas Operations Bill.

[50][51] In February 2022, Blake spoke in Westminster Hall on a debate on Special Educational Needs and Children's Mental Health Services.

Blake recalled being called "lazy", "distracted" and "in disarray" and criticised the education system's current approach, encouraging support for young people.

[52][53][54] In March 2023, Blake tabled an amendment to the Government's Illegal Migration Bill, to create a "safe passage" visa to give entry clearance to those already in Europe wishing to come to the UK to make an asylum claim.

Blake said that 'if we want to save lives, ministers need to change their approach, drop the cruel and inhumane deterrence policies, and look at real solutions.

[59] In November 2024, Blake voted in favour of the Terminally Ill Adults (End of Life) Bill, which proposes to legalise assisted suicide.