Stephen Ashley Sherbourne, Baron Sherbourne of Didsbury, Kt, CBE (born 15 October 1945) is a British Conservative who was Political Secretary for Prime Minister Margaret Thatcher and Chief of Staff to Conservative leader Michael Howard. He is currently a non-executive director of Smithfields Consultants. He was born in Manchester, and studied Philosophy, Politics and Economics (PPE) at St Edmund Hall, Oxford. He is known for his interest for liberal democracy and the free market.