PLEASE NOTE: We are unable to offer transcripts for our programme interviews. Today is broadcast live and the running order is subject to change.
The Commons Speaker Michael Martin - who is under pressure to resign - will meet party leaders to discuss immediate reforms to the expenses system for MPs. And the President of Sri Lanka has claimed victory in the country's 26-year civil war against the Tamil Tigers.
'People feel sick and let down'
Labour's ruling National Executive Committee will meet to discuss what should be done about any Labour MPs who have broken the rules. Paul Kenny, general secretary of union the GMB, discusses claims of allowance abuses by its MPs.
President Obama has urged the Israeli Prime Minister Benjamin Netanyahu to accept the idea of a Palestinian state. Israeli diplomat Alon Pinkas discusses if it is a "historic opportunity to get a serious movement" on Palestinian statehood.
Home Secretary Jacqui Smith has been accused of back-tracking on a pledge to protect women forced into prostitution. Helen Atkins, from the Poppy Project charity, discusses if that would mean fewer women are protected.
Mockingbirds can remember the faces of people who go too close to their nests and then single them out for attack, scientists at the University of Florida have discovered. Professor Douglas J Levey, of the university's department of Zoology, explains how the findings were made.
Sri Lankan leader Mahinda Rajapaksa has declared the country "liberated" from Tamil Tiger rebels after a 26-year war. David White, Oxfam's acting country director in Sri Lanka, considers if the conflict really is over.
Lakeland habitats in England and Wales need urgent action if they are to maintain their environmental and economic value, the Environment Agency says. Environment correspondent Sarah Mukherjee reports from the shores of Lake Windermere on the future of lakes around the world.
A report examining what MI5 knew about the 7 July London bombers before their 2005 attacks is published later. Security correspondent Gordon Correra and Rachel North, who was injured in the bombings and has represented the victims and their families, discuss what could be contained in the report.
The audio has been edited from the version broadcast on the programme.
The Commons Speaker Michael Martin - who is under pressure to resign - will meet party leaders to discuss immediate reforms to the expenses system for MPs. Conservative leader David Cameron discusses the ways claims would change if his party was elected. Political editor Nick Robinson reports on the calls for the Speaker to resign.
Hundreds of people around the world say they live with a continuous low-pitched buzzing sound. Reporter James Alexander examines claims from scientists that they have worked out what is causing the sound.
British forces serving abroad should be protected by the Human Rights Act - even when they are not at military bases, the Court of Appeal has ruled. Former head of the Army General Sir Mike Jackson discusses what the implications of this ruling could be.
A Catholic priest has uncovered hundreds of mass graves of Jews murdered by Nazi "mobile killing units". The priest, Father Patrick Dubois, and Dr Jean-Marc Dreyfus, a holocaust historian at Manchester University, discuss how the Nazis operated outside of concentration camps.
Alfie Patten, the boy who was reported to have conceived a child when he was 12 years old, is not the baby's father, DNA tests have shown. Publicist for Alfie's family Max Clifford discusses why the media got involved in the story.
The switch to farming has done more to change the world than any other human activity and may have been one of man's biggest mistakes, an author argues. The author, Tom Standage, and Peter Kendall, president of the National Farmers' Union, discuss how the history of food has affected the history of man.