From the Second World War to the War on Terror, via Kenya and Northern Ireland, award-winning investigative journalist Ian Cobain's new book Cruel Britannia explores Britain's role in the development and use of torture. We will be asking whether it is time to challenge the official line that the UK does not 'participate in, solicit, encourage or condone' torture. Chaired by Humphrey Hawksley, leading BBC foreign correspondent, author and commentator on world affairs.