Overview:Michael Portillo continues his thousand-mile journey aboard the Unification Railway from Ho Chi Minh City in the south to the capital, Hanoi, and on to the vast northern port of Haiphong. He finishes amid the limestone islets in the turquoise waters of Halong Bay. Steered by his 1913 Bradshaw’s Guide, Michael travels through what was French Indochina and is today the Socialist Republic of Vietnam.