Following the arrests of more journalists at the Sun over the weekend, Geoffrey Robertson QC explains why handing over the details of journalists' e-mails to the police may violate a moral and legal duty to protect sources.After more journalists at the Sun were arrested over the weekend, the Sun's associate editor Trevor Kavanagh accused police of a "witch-hunt". But has the police investigation gone too far? Prof Brian Cathcart and Peter Preston discuss the latest developments. Last week the BBC's director general Mark Thompson admitted that there aren't enough older women on television and radio. But is anything being done to address the problem? Former controller of BBC 1 Lorraine Heggessey and journalist and broadcaster Joan Smith discuss women on screen. Following the news of the death of veteran Royal correspondent James Whitaker, we hear from Ingrid Seward of Majesty Magazine and photographer Arthur Edwards who both knew and worked with him. The producer is Olivia Skinner.