Morning news and current affairs with James Naughtie and John Humphrys, including:
While David Cameron has been in India he has visited Amritsar, the scene of a massacre by the British army when Britain was the colonial master nearly a century ago. William Dalrymple, writer and historian, examines whether the British prime minister should have apologised.
The Department of Health has asked Camilla Cavendish to lead an independent review into health care assistants in the NHS and care homes as a result of the Mid Staffordshire revelations. Ms Cavendish, assistant editor of the Times, outlines the role that she will play.
Last week saw the arrest of a senior police officer accused of leaking confidential information to journalists. Danny Shaw, home affairs correspondent, explains the current status quo, Kevin Harley, British Police and Crime Commissioner for Surrey Police, and Lord Prescott, former deputy prime minister, discuss why some are saying that the police operations that were aimed at rooting out police corruption have gone too far.
Astronomers at Cambridge University have used technology they developed to monitor stars in the deepest part of the universe to help their pathologist colleagues identify breast cancer in the lab. Dr Nicholas Walton, of the Institute of Astronomy at the university, and Dr Elena Provenzano, of the university pathology department, discuss the amalgamation of the technology.
Inside the Mind of Professor Stephen Hawking
Wednesday 20 February
Has Operation Elveden - set up to identify police officers who had been paid by journalists for information - gotten out of hand? Plus, we speak to Camilla Cavendish - the journalist who has been tasked by the government with leading a review of care assistants in the NHS.
Head of Universal UK has said that the recording industry is still struggling to cope with the problem of online piracy. John Rink, professor of musical performance studies at Cambridge University, and Julie Sanders, professor of English literature and drama at Nottingham University, discuss how much of a problem piracy has been for the musicians and publishers through the ages.
Thieves drove onto Belgium's airport tarmac yesterday and stole more than $50m of diamonds from a plane without firing a single shot in only a few minutes. Jeff Edwards, president of the Crime Reporters Association and former chief crime correspondent for the Daily Mirror, and Barry Forshaw, author of British Crime Film, examine the appeal and romance of a diamond heist.
Less than half the population of London can now be accurately described as "white British". Danny Dorling, professor of human geography at Sheffield University, and Oona King, former Labour MP, discuss reasons for shifting ethnic populations in London.
0835Sony is expected to unveil details of its new PlayStation device later today in New York. Dominic Laurie speaks to Chris Green, principal technology analyst at Davies Murphy Group, consultant with the tech sector.