Lady Justice Arden sits on the Court of Appeal and is the UK's second most senior female judge. Twenty years ago she was the first woman to be appointed to the High Court’s Chancery Division, then the first woman to chair the Law Commission. In 2000 she became only the third woman to join the judicial ranks in the Court of Appeal. However women still represent just 16% of Appeal Court judges, with only one female out of twelve justices on the UK Supreme Court. Mary Arden is currently Head of International Judicial Relations for England and Wales and is a member of the Permanent Court of Arbitration in The Hague. Earlier this year she was named in the Woman's Hour Power List.

Harriet Harman, Labour's deputy leader and Power Lister, talks to Jane Garvey from the party's annual conference about her life in politics.

Jasmine Whitbread, the chief executive of Save the Children International, left her highly paid job in the commercial sector to work in the voluntary sector. She discusses what motivated her move and why she thinks a job is not worth doing unless it's scary.

Dame Stephanie “Steve” Shirley is a philanthropist and The Shirley Foundation is one of the top 50 grant-giving foundations in Britain. She arrived in Britain on the Kinderstransport in 1939, aged five. In 1962, she founded her first software company and went by the name “Steve” to open doors in the male-dominated business world. She retired in 1993 with an estimated £150 million fortune. Dame Stephanie now concentrates on philanthropic work and donates to autism research.

Professor Dame Sally Davies is the Chief Medical Officer for England and the first woman to fill this post. She guides government decisions on diverse subjects such as superbugs, drug trials and obesity. She is also number 6 on the Woman’s Hour Power List.

Karren Brady is well known as the right hand woman to Sir Alan Sugar on TV’s The Apprentice, and also as a formidable force in business – standing out not only as a huge success, but also as a woman in the undeniably male world of football. She started her 20 year career in football when she was appointed Managing Director of Birmingham City Football Club aged only 23, and took the club from administration to sell it for an incredible £82 million. Now she’s Vice Chairman of West Ham.

How to be a Powerful Woman - a series of Woman's Hour Power List films are launched in this live programme, presented by Jane Garvey, from the Radio Theatre at Broadcasting House.

Sophie Turner Laing is the Managing Director, Content of BskyB. She’s responsible for their entertainment and news channels including the likes of Sky 1 and Atlantic. As one of the 100 most powerful women on the Woman’s Hour Power List - she joins Jenni to talk about what it’s really like working in TV, the myth of the work-life balance, and why it’s important to realise that you don’t need to know everything.

Ann Widdecombe, fines for unmarried mothers in China, US author Curtis Sittenfeld and the proposed anti-social behaviour bill.

Baroness Tanni Grey-Thompson reveals how life as a top athlete helped her prepare for the rough and tumble of politics and how she manages to persuade her 11 year old daughter to sit quietly through House of Lords debates.