[5] Mackory was elected as a Conservative councillor on Cornwall Council for the ward of St Mewan in May 2017.

[3] In November 2019, upon the confirmation of a general election by Parliament, Mackory was selected to stand for the Conservative Party in the constituency of Truro and Falmouth.

[7] In March 2022, Mackrory was elected as the Chairman of the Department for Levelling-Up, Housing and Communities 1922 Backbench Policy Committee.

[citation needed] In June 2022, Mackrory was appointed as Parliamentary Private Secretary for the Ministry of Justice ministers Mike Wood and Julie Marson.

[8] In the 2024 United Kingdom general election, she was unseated by Labour candidate Jayne Kirkham.