Today's running order
All timings subject to change
Yesterday the Met Office reported that this year's ice melt was "very extreme", already setting a number of records, and part of a long term trend - "the decline is alarming" they say. Edie Rodriguez is president and CEO of Crystal Cruises and Andrew Latham is vice president of oil exploration research at Wood Mackenzie.
The NSPCC are launching a special helpline today in the wake of terrorist attacks. There has been a rise in the number of parents calling, worried their children are being radicalised - others are concerned because their children are frightened. Alan Wardle is director of policy at NSPCC.
What measures have been taken in the UK to deal with people who mount a potential terror threat? Chris Phillips is former Head of the National Counter Terrorism Security Office.
Growing pressures are leading UK hospitals to increasingly rely on premium overtime pay to get consultants to do extra work, the BBC has found. Danny Mortimer is chief executive of the NHS Employers.
More on the terror attack in France: Austen Ivereigh is author of The Great Reformer, a biography of Pope Francis, and former editor of The Tablet, and Father Christopher Jamison is director of the Roman Catholic National Office for Vocation.
The Today programme has been given access to Oakwood – a category C prison which is set to become one of the largest in England and Wales. The last two inspection reports were very critical of the prison and its staff. Sima Kotecha has been given access to the prison.
Dolly the sheep's "siblings" are generally healthy, a study has shown, providing hope that cloning can yield animals free from degenerative illness. Are scientists looking to other techniques to carry out genetic research, or does cloning still have a place? Professor Robin Lovell-Badge is group leader of the Francis Crick Institute.
More on the terror attack in France: Bernard Henri Levi is a French philosopher and author, and Corinne Narassiguin is the spokesperson for France's governing Socialist Party.
Fashion designer Vivienne Westwood and her husband Andreas Kronthaler have designed a new jacket for "the best choir in the world" - The Monteverdi Choir – who have been conducted by Sir John Eliot Gardiner for over 50 years. The BBC’s arts editor Will Gompertz has been talking to the pair.
More on recent reports outlining the condition of Oakwood prison: Jerry Petherick is G4S managing director for custodial and detention services.
Today the Rosetta Mission will shut off its only means of communication with the Philae Lander which landed on Comet 67P in 2014. It is part of the process of winding down the Rosetta Mission. Monica Grady is professor of Planetary and Space Sciences at the Open University.
Former US President Bill Clinton has set out the case why his wife and "best friend" Hillary should lead the nation. Barbara Plett-Usher reports.
More on the recent attack in France: Mathieu Kassovitz is the director of La Haine - the 1995 drama exploring the social issues of modern France.
Wales' only ballet company will be performing at the National Eisteddfod - the Welsh cultural festival in Abergavenny at the beginning of August. They are the first ballet company ever to perform there. Darius James is Artistic Director of Ballet Cymru.