1/2. An extreme brand of free-market ideology called libertarianism took over the Conservative Party's student wing in the mid-1980s and looked set to conquer the party at large. Legalising hard drugs and liberalising immigration controls were among the radical policies advocated. But where are the ideologues now? The Times columnist Tim Hames tracks down the former student radicals and examines how pragmatism eventually triumphed over ideology. Producer Innes Bowen Repeated from Sunday at 10.45pm