n Between 1968-71 mainland Britain suffered a campaign of 25 bombings. There were no fatalities and, at first, no identifiable bombers. That changed on 12 January 1971, when the target was Robert Carr , the Tory Minister for Employment and Productivity. Accompanying the bomb was a "communique" from the "Angry Brigade". Who were they? What did they want? Thirty years on, Jonathon Green examines the legacy of a moment in British history when a small group of dedicated urban guerrillas attempted to bring the country to its knees. Producer Fran Robertson