She served as an Assistant Government Whip from October 2022 to November 2023,[2] having previously held the office from July to September 2022.

A member of the Conservative Party, she also served as Parliamentary Under-Secretary of State for Employment between July 2022 and September 2022.

[8] Marson was previously a councillor on Thanet District Council in Kent, representing the Viking ward from 2011 to 2015.

[8] She contested the Labour-held East London seat of Dagenham and Rainham at the 2015 general election, finishing in third place.

[14] Later that month, Marson called for LGBT+ conversion therapy to be banned, labelling it "morally and medically wrong.