The World Tonight

One of the authors of the government’s Strategic Defence Review has hit out at what he calls "corrosive complacency" on the part of the government. Lord Robertson, a former Labour defence secretary and NATO secretary general, said current levels of welfare spending were unsustainable and that security must be prioritised. Also on the programme: The International Monetary Fund warns that the war in Iran will hurt the UK more than any G7 country. And we look at a landmark exhibition on the history of Black British music.