By law, anyone who looks after a child for more than two hours a day and gets paid for it must be registered by the local authorities. But because there aren't enough registered minders, every morning something like 100,000 babies are delivered into the care of illegal back-street minders. Registration, however, is no longer the main issue. What is now being questioned are the long-term effects of the baby-minding system. John Pitman has talked to both legal and illegal minders and working mothers whose children are at risk because they can't afford to be too choosy about who minds their babies.