Anita Rani explores the coastline of South Wales, visiting the beaches where Henry Tudor fled into exile during the Wars of the Roses, and Malcolm Campbell broke the 150mph land speed record in 1925. In Llansteffan, Anita discovers that the ancient livelihood of cockling is still alive and well, and she also visits the place where a wireless message was sent over water for the first time and meets the granddaughter of Dylan Thomas.