Michael Portillo continues his thousand-mile journey through Vietnam aboard the Unification Railway from Ho Chi Minh City to the capital, Hanoi.Leaving what locals still call Saigon, Michael heads to the fishing port of Phan Thiet, where he learns how to make Vietnam's signature fish sauce.In the Annamite Mountains west of Da Nang, Michael joins modern Vietnamese on holiday in a quirky facsimile of a medieval French village.And in the tailoring capital of Hoi An, Michael discovers the favourite food of the region's silkworms and sees how Cham weavers make their distinctive brocade. Can he resist a colourful new jacket?