South West Norfolk is a constituency represented in the House of Commons of the UK Parliament since 2010 by Liz Truss of the Conservative Party, who briefly served as Prime Minister of the United Kingdom from September to October 2022.

Mary Elizabeth Truss is a British politician who served as Prime Minister of the United Kingdom and Leader of the Conservative Party from September to October 2022. On her fiftieth day in office, she stepped down amid a government crisis, making her the shortest-serving prime minister in British history. The member of Parliament (MP) for South West Norfolk since 2010, Truss previously held various Cabinet positions under three prime ministers—David Cameron, Theresa May and Boris Johnson—lastly as foreign secretary from 2021 to 2022.