A decade ago, Manu Chao's band, Mano Negra, toured Columbia by train, negotiating with government troops and rebels - an episode described at the time as 'less like a rock'n'roll tour - more like Napoleon's retreat from Moscow'. He is a multi-million selling artist who prefers sleeping on friends' floors to five-star hotels, an anti-globalisation activist who hangs out with prostitute-activists in Madrid, a recluse who is at home singing in front of 100,000 people in stadiums in Latin America or festivals in Europe. 'Clandestino' has been five years in the writing, as Peter Culshaw followed Manu around the world.