Mostyn Neil Hamilton (born 9 March 1949) is a British former barrister and politician who has been leader of the UK Independence Party (UKIP) since 2020. He was the Conservative Member of Parliament (MP) for Tatton from 1983 to 1997 and a UKIP Member of the Senedd (MS) for Mid and West Wales from 2016 to 2021. Hamilton was elected to the House of Commons in the 1983 general election. He was appointed Parliamentary Under-Secretary of State for Corporate Affairs by Prime Minister John Major in 1992.