Plot: Michael Portillo follows his 1930s Bradshaw’s guide to the unspoilt East Sussex port of Rye, where he learns about the loss of a generation of lifeboatmen in 1928 and explores a wartime pillbox. On the beaches at Rye, Michael explores one of 28,000 pillboxes constructed around the British coastline during World War II and hears from a military historian about how the nation prepared for an expected German invasion