Stephen Green, the former HSBC boss, refuses to answer questions put to him by the BBC's Richard Bilton for the Panorama programme. Lord Green was the boss of HSBC at the time its Swiss bankers are accused of helping thousands of wealthy clients to avoid tax. In 2010, the Conservatives appointed him to the House of Lords and to the government as minister for trade and investment



• Panorama is broadcast on BBC1 on Monday at 8.30pm