In some of Britain’s key cities—including London, Manchester, and Oxford—over half of the children are now born to mothers who themselves were born overseas, according to a report by Migration Watch. The self-styled immigration watchdog says that an analysis of official data shows that over the last half century, the proportion of children born to non-UK-born mothers has more than doubled. Migration Watch, which often champions a reduction in immigration levels, said that “hyper-diversity” in urban areas could be driving divisions in society, with various social forces already creating trends of organic segregation of communities with different values. Alp Mehmet, Chairman of Migration Watch UK, said in a statement, “The rapidly changing nature of our towns and cities poses serious risks for integration and will be a real concern to many in this country. This is not inevitable. We can and must reduce the scale of immigration very considerably if …