Jeremy John Durham Ashdown, Baron Ashdown of Norton-sub-Hamdon,, better known as Paddy Ashdown, was a British politician and diplomat who served as Leader of the Liberal Democrats from 1988 to 1999. Internationally, he is recognised for his role as High Representative for Bosnia and Herzegovina from 2002 to 2006, following his vigorous lobbying for military action against Yugoslavia in the 1990s.

The Liberal Democrats are a political party in the United Kingdom. Party members elect the leader of the Liberal Democrats, the head and highest-ranking member of the party. Liberal Democrat members of Parliament also elect a deputy leader of the Parliamentary Party in the House of Commons, often colloquially referred to as the deputy leader. Under the federal constitution of the Liberal Democrats the leader is required to be a member of the House of Commons.