This is London : life and death in the world city

London is a global city. More than half of those who live in the UK's capital came from somewhere else - and most arrived in the last ten years. Migration is transforming London, for better and for worse. Ben Judah turns his reporter's eye on home, immersing himself in the hidden world of the city's immigrants - from the richest to the poorest - to discover the complex and varied individuals who are making London what it is today