91Èȱ¬

0650

Space evangelist and entrepreneur Elon Musk suggested nuking Mars could make it more hospitable to humans. Dr Geraint Jones is from UCL's Millard Space Science Lab.

0710

A campaign is being launched to try to get a review of the case of a Royal Marine jailed for life for killing a Taliban militant. Sergeant Alexander Blackman shot dead the injured captive in Helmand Province in Afghanistan in September 2011. We speak to his barrister, Jonathan Goldberg QC.

0715

The 91Èȱ¬ Secretary Theresa May and Communities Secretary Greg Clark chair the first meeting of a committee on Syrian refugees later today. It will consider plans to house and support Syrians resettled by the UK Government. David Green is leader of Bradford City council.

0720

Social inequality is killing 200,000 people in the UK every year. We speak to professor Sir Michael Marmot, author of ‘The Health Gap’ and president elect of the World Medical Association.

0730

Northern Ireland First Minister Peter Robinson has stepped aside and other DUP ministers are to resign as a result of the political crisis at Stormont. We speak to Sinn Fein minister Michelle O'Neill and Theresa Villiers, secretary of state for Northern Ireland.

0745

The band REM have criticised Donald Trump for using their music on his campaign. Adam Cumiskey reports.

0750

The Archbishop of Canterbury Justin Welby has told the 91Èȱ¬ that the issue of assisted dying is one of the "biggest dilemmas of our time", but says that the current law is working. We speak to Lord Falconer, who sponsored an assisted dying bill in the last parliament.

0810

A campaign is being launched to try to get a review of the case of a Royal Marine jailed for life for killing a Taliban militant. Sergeant Alexander Blackman shot dead the injured captive in Helmand Province in Afghanistan in September 2011. We speak to journalist Frederick Forsyth and Joshua Rozenberg, who presents Radio 4's Law in Action.

0820

Northern Ireland First Minister Peter Robinson has stepped aside and other DUP ministers are to resign as a result of the political crisis at Stormont. We hear from Lord Trimble, who won the Nobel Prize for his part in bringing peace to NI when he was First Minister.

0830

Is it possible to make a distinction between economic migrants and genuine refugees? Lyse Doucet is our chief international correspondent. Adam Holloway is the Conservative MP for Gravesham.

0840

The South African William Kentridge has been described as one of the most important, politically engaged artists living today. Arts Editor Will Gompertz reports.

0845

The British Medical Association, representing doctors, has agreed to start negotiations over reforms to consultants’ contracts including ending the right to opt out of weekend working. We hear from Dr Paul Flynn, chair of the British Medical Association’s Consultants Committee.

0850

The rugby World Cup starts a week today. The first game will see England play Fiji at Twickenham. Garry Richardson reports.

0855

Images of passengers grabbing their hand luggage before evacuating the BA plane which caught fire in Las Vegas earlier this week prompted widespread criticism on social media. Lyn Hughes isÌýeditor in chief of travel magazine Wanderlust. Elle Croft is a travel blogger and an expert on travelling light.

All subject to change.