Mary Elizabeth Truss is a British politician who served as the 56th Prime Minister of the United Kingdom and Leader of the Conservative Party from September to October 2022. Her tenure, lasting 50 days, made her the shortest-serving prime minister in British history. She was first elected to Parliament as the Member of Parliament (MP) for South West Norfolk in 2010, a position she held until 2024. Truss was the first British Prime Minister to have been educated at a state Comprehensive school.