Mhairi Threlfall was the labour councillor for Eastville for 8 years and sat as the Cabinet Advisor for Place and then the Cabinet member for with responsibility for Transport over the course of two mayoral administrations. She also chaired the congestion task group and set-up and chaired the regional transport board and regional scrutiny transport group. Mhairi also stood for Parliament in 2017 and 2019 for the Labour Party. In October 2021, she was made an Alderwoman of the city. She is currently works at the University of the West of England.