The end of this month marks two important changes in British life: July 1 marks the official start of a smoke-free Britain in all public places, while tomorrow will mark the official end of Tony Blair's tenure as prime minister. McGill political scientist Antonia Maioni writes in the Toronto Star that, in both cases, we are witnessing the end of an era. These changes are minor, however, compared with the problems of immigration and cultural integration that Britain faces, which question the very core of what it means to be British.