Baroness Nicholson of Winterbourne was ennobled and took her seat as a member of the House of Lords in the United Kingdom Parliament in 1997, having also served as a Member of the House of Commons and, subsequently, in the European Parliament.

She is a member of the United Kingdom Delegation to the Parliamentary Assembly of the Council of Europe. She chairs the All-Party Parliamentary Groups for Foreign Affairs. She is Vice-Chairman of the All-Party Parliamentary Groups on Human Trafficking; for EU Enlargement; and for Georgia; and remains an active participant in a large number of these Groups. 

She was appointed as Prime Minister’s Trade Envoy to Iraq by The Rt Hon David Cameron MP in January 2014.  She is the Executive Chairman of the Iraq Britain Business Council (IBBC), Chairman of the AMAR International Charitable Foundation, and President of Acociatia Children’s High Level Group (ACHLG).