At the snap
2017 general election, Farris stood as the
Conservative candidate in
Leyton and Wanstead, coming second with 20.8% of the vote behind the incumbent
Labour MP
John Cryer. Farris was selected as the Conservative candidate for
Newbury on 10 November 2019. At the
2019 general election, Farris was elected as MP for Newbury, winning with 57.4% of the vote and a majority of 16,047 votes. Her father had represented the constituency between 1974 and 1992. She has been a member of the
Justice Select Committee since June 2021 and the
Privileges Committee and the
Standards Committee since March 2022. Farris was a member of the
Home Affairs Select Committee from March 2020 to March 2022. She identifies as a
one-nation conservative. On 22 October 2021, Farris opposed a bill to prevent employers from firing employees and rehiring them on worse terms and conditions. She stated during the debate that the rules on fire and rehire needed to be tightened up, but the choice should be available as "an option of last resort" for companies facing insolvency. In November 2021, a man was convicted of sending a malicious communication to Farris in 2020 and given a suspended sentence. Farris endorsed
Rishi Sunak in the
2022 Conservative Party leadership election. In July 2023, Farris was re-selected as the Conservative candidate for Newbury at the
2024 general election, however she lost the election to
Lee Dillon, a
Liberal Democrat - whom she had defeated in 2019 - with a swing of almost 20%. ==Post-parliamentary career==