Margaret became the Labour Member of Parliament for Barking in June 1994. She has served in government, holding portfolios across education, work and pensions, business and culture. In 2010, Margaret also became the first elected Chair of the Public Accounts Committee and was also its first female Chair. Today, Margaret is the Chair of the APPG on Anti-Corruption and Responsible Tax. She is also the Chair of Theatre Royal Stratford East as well as Royal Holloway, University of London.