Prime minister Keir Starmer and home secretary Yvette Cooper have announced a crackdown on migration.Yvette Cooper refused to repeat Keir Starmer’s divisive claim that “Britain risks becoming an island of strangers” this morning.The prime minister uttered the incendiary phrase on Monday while announcing his immigration crackdown.It instantly attracted comparisons with former Tory minister Enoch Powell, who claimed in the 1960s that white people would become