Immigration special Robin Lustig chairs a special debate from the leading think-tank, Chatham House, on British immigration policy. Immigration is one of the most sensitive issues in British politics with opinion polls suggesting there is widespread public concern. So what are the economic, social and cultural costs and benefits of immigration; and what should the government do about it? On the panel Trevor Phillips, Equality and Human Rights Commission David Frost, British Chambers of Commerce Baroness Shreela Flather, House of Lords Douglas Murray, Centre for Social cohesion.