James Gordon Brown is a British politician known for his extensive career in government, culminating in his service as Prime Minister of the United Kingdom and Leader of the Labour Party from 2007 to 2010. Prior to this, he held the position of Chancellor of the Exchequer from 1997 to 2007 under Tony Blair, becoming the longest-serving Chancellor in modern history. Brown was also a Member of Parliament for Dunfermline East from 1983 to 2005 and for Kirkcaldy and Cowdenbeath from 2005 to 2015.