Liz Truss was prime minister of the United Kingdom for 49 days, from 6 September 2022 to 25 October 2022, making her the shortest‑serving UK PM in history.

Quick scoop

  • Liz Truss officially took office as UK prime minister on 6 September 2022, succeeding Boris Johnson.
  • Her premiership ended on 25 October 2022, after she announced her resignation amid political and market turmoil.
  • Counting from appointment to leaving office, her time as PM is recorded as 49 days, the briefest tenure of any UK prime minister.

Why it matters

  • Her short spell in Downing Street followed a contentious “mini‑budget” that triggered financial market instability and a loss of confidence in her leadership.
  • Because of this, Liz Truss is now widely referenced in news, commentary, and forums as the shortest‑serving British prime minister on record.

Information gathered from public forums or data available on the internet and portrayed here.