Last year in Spain, some 50,000 children were in state care – a high number that is largely a consequence of failures in the care system. In Spain, children can be taken into care as a precautionary measure, a step that is five times more frequent than in neighbouring France. The decision in Spain to remove children from their parents is made not by a judge but by social workers. However, it often becomes irreversible, meaning that those parents face a long battle to get their children back. Our correspondents investigate.