The increasing number of cases involving allegations that children are at risk of being radicalised or taken out of the country to join Islamic State must be dealt with by a High Court judge, the head of the Family Division has said. The guidance, issued by Sir James Munby, also urged the police to apply for orders to stop vulnerable children being taken to Syria rather than waiting for local authorities to act. Orders have been made to safeguard at least 23 children, the youngest of which was aged one.