Stop people in Africa, before they get anywhere near the Mediterranean, and sort them into refugees and migrants there, only allowing the refugees to continue to Europe. This was the big idea that came out of last week’s EU migration summit. But campaigners say the predicament of 260 children stuck in limbo in Niger demonstrates that there is no guarantee EU countries would eventually take the refugees, even if African countries agreed to this arrangement. In November, amid horrific tales of Africans being enslaved, imprisoned and tortured in Libya, Niger agreed to act as a halfway house for refugees that UNHCR, the UN’s refugee agency, had identified and could get out.