Lyn Carol Brown (born 13 April 1960) is a British politician serving as Member of Parliament (MP) for West Ham since 2005. A member of the Labour Party, she was a Shadow Minister for the Home Office from 2015 to 2016, Shadow Policing Minister from 2016 to 2017, Shadow Exchequer Secretary to the Treasury from 2018 to 2020, and Shadow Minister for Prisons and Probation from 2020 to 2021.