Nancy Mosquera, a mother of five, clutches a baby wrapped in a blanket as she weaves through cars waiting at the traffic lights in affluent north Bogotá. Around her neck hangs a laminated placard that reads: “We have been displaced because of the violence. Please give what you can. God bless you.”

The scene is replayed across Colombia as people fleeing largely rural violence flock to the largest cities. After Sudan, Colombia has the second highest population of internal refugees in the world – an estimated 3m, according to a recent report by UNHCR, the United Nations refugee agency.