Today: Thursday 16th February

Defra is calling a crisis summit to deal with the worst drought since 1976, caused by a lack of rain across Britain. David Cameron is going to Edinburgh to argue that Scotland is stronger, safer and richer inside the United Kingdom. And also on today's programme, the man who donated one of his kidneys to a complete stranger.

0615
Business news with Simon Jack who speaks to Russian billionaire Viktor Vekselberg about creating Russia's own Silicon Valley.

0650
According to new research, computer programs can be taught to differentiate between the brain scans of healthy adolescents and those most at risk of developing psychiatric disorders, such as anxiety and depression. Co-author of the research Professor Mary Phillips, from the University of Pittsburgh, outlines what they found.

0709
David Cameron is to make a speech to the Scottish people, which is being seen by many as the opening salvo in the unionist campaign. John Curtice, professor of politics at Strathclyde University, analyses whether his intervention will help or hinder the unionist cause.

0712
The head of the Euro group of finance ministers, Jean-Claude Juncker, has said he is confident a decision on a second Greek bailout will be made next Monday. Economics editor Stephanie Flanders looks at whether the pressure on the Greeks is leading eurozone leaders to prepare for Greece to leave the euro.

0716
North Korea is preparing to mark the birth-date of its former leader Kim Jong-il. Since his sudden death in December, North Korea has been headed by a much less familiar figure: his son, Kim Jong-un. Korea correspondent Lucy Williamson reports on their very different personal styles.

0720
Business news with Simon Jack.

0723
Members from all parties in the London Assembly have been trying to find out how many Olympic tickets have been sold and for how much from the organising committee - London Organising Committee of the Olympic and Paralympic Games (Locog). Baroness Dee Doocey, Liberal Democrat Peer and chair of the London Assembly's economy, culture and sport (ECS) committee, explains their difficulties.

0726
Sports news with Garry Richardson.

0733
We heard yesterday from the charity Save the Children about their fears that that 500m children globally risk becoming mentally and physically stunted over the next 15 years unless there is international action to curb malnutrition. Lord Desai, economist and Labour peer who divides his time between UK and India, explains the response from the Indian government, one of the countries under the microscope.

0737
Paper review.

0740
The track cycling World Cup begins today at the Olympic Velodrome and all the top names in cycling from Team GB will be in action. Performance director Dave Brailsford lays out his medal hopes.

0743
In Uganda a bill is being considered by parliament which proposes harsh penalties for homosexuals - including lengthy prison sentences and even the death penalty. East Africa correspondent Will Ross reports from Nairobi on the number of Ugandans fleeing the country due to an increase in homophobia.

0747
Thought for the Day with Akhandadhi Das - a Vaishnav Hindu teacher and theologian.

0751
BBC racing commentator Richard Pitman has donated a kidney to a stranger after seeing one of his close friends benefit from a kidney transplant. He tells the Today programme why he decided to have the operation.

0810
Defra is calling a crisis summit to deal with the worst drought in Britain since 1976 and the Environment Agency say they are planning for the worst. The Today programme's Andrew Hosken reports from Chesham, Buckinghamshire, where the river Chess is dry. And Trevor Bishop, head of water resources at the Environment Agency and Paul Valleley, director of water services at Anglia Water, discuss the water shortage.

0818
Just over a hundred years since Picasso was first exhibited in Britain after being championed by members of the Bloomsbury Group, the same Picasso paintings are now being shown at Tate Britain in London. The Today programme's Nicola Stanbridge took a tour of the exhibition with one of the Bloomsbury set's descendants.

0822
Sports news with Garry Richardson.

0835
Barclays Bank is launching a mobile phone app which will allow you to transfer money to someone else just by using their mobile phone number and without need for bank details. Technology correspondent Rory Cellan-Jones explains how it works. African Business Report presenter Komla Dumor describes how Africa is ahead of the game on this technology and Adrian Kamellard, chief executive of the Payments Council, talks about whether it will be something available to everyone.

0841
More than 350 people are now known to have died in a fire which swept through an overcrowded jail in Honduras. Read Will Grant's report from the scene.

0843
Business news with Simon Jack.

0846
In the wake of the Leveson Inquiry, the House of Lords Communications Committee has undertaken a review of the field of investigative journalism in which it says that the field faces profound economic, legal and regulatory challenges. The committee's chair, Lord Inglewood, outlines the report's main findings.

0850
Prominent US biologist Professor David Sloan Wilson says business leaders and politicians have wrongly taken up the idea of a selfish gene as advanced by Richard Dawkins and used it to promote selfish behaviour. He describes his alternative model for business and public life.

0855
David Cameron is making a speech to the Scottish people which is being seen by many as the opening salvo in the Unionist campaign. Lesley Riddoch, columnist on the Scotsman, and Magnus Linklater, Scotland editor of The Times, discuss what Scots think of the prime minister.