Bathgate and Linlithgow.

Sullivan is most visible right now on two fronts: welfare and women's health. In July 2025 she broke with her party to back protections for disabled people with fluctuating conditions during the Universal Credit and PIP Bill's committee stage -- one of several rebel votes that places her noticeably to the left of the Labour leadership on welfare. She has also led sustained parliamentary advocacy on endometriosis, chairing the relevant All-Party Parliamentary Group, raising the issue at PMQs twice, and introducing a Bill to mandate inclusive personal protective equipment standards for workers such as firefighters and police officers. Local press coverage over the past year has been consistently positive.

A 96.3% party-line voter across 374 recorded votes, Sullivan is broadly loyal but with clear pressure points. Her voting record shows she deviates from Labour colleagues most sharply on pension protection (+54 percentage points above the party average) and disability benefits (+25pp), and she sided with the restricting amendments on the assisted dying bill in June 2025 rather than following the Labour majority. She participates in 73% of votes -- slightly below the Commons average -- and her speeches cluster around the economy and jobs, health, social care, and local government.

Sullivan sits on the Scottish Affairs Committee and the Administration Committee, and her speech topics suggest a dual focus: broad economic and cost-of-living questions alongside constituency-specific casework, particularly on health inequality and workplace safety. Her advocacy for Peter McLagan -- Linlithgow's first Black MP -- reflects an interest in local heritage. Voting and speech data cover her full term since July 2024; news data covers the most recent 90 days.